diff --git a/OWNERS_core_networking_xts b/OWNERS_core_networking_xts
index 59d6575..8083cbf 100644
--- a/OWNERS_core_networking_xts
+++ b/OWNERS_core_networking_xts
@@ -4,4 +4,4 @@
 # For cherry-picks of CLs that are already merged in aosp/master.
 jchalard@google.com #{LAST_RESORT_SUGGESTION}
 maze@google.com #{LAST_RESORT_SUGGESTION}
-reminv@google.com #{LAST_RESORT_SUGGESTION}
\ No newline at end of file
+reminv@google.com #{LAST_RESORT_SUGGESTION}
diff --git a/Tethering/src/com/android/networkstack/tethering/TetherLimitKey.java b/Tethering/src/com/android/networkstack/tethering/TetherLimitKey.java
index a7e8ccf..68d694a 100644
--- a/Tethering/src/com/android/networkstack/tethering/TetherLimitKey.java
+++ b/Tethering/src/com/android/networkstack/tethering/TetherLimitKey.java
@@ -28,26 +28,4 @@
     public TetherLimitKey(final int ifindex) {
         this.ifindex = ifindex;
     }
-
-    // TODO: remove equals, hashCode and toString once aosp/1536721 is merged.
-    @Override
-    public boolean equals(Object obj) {
-        if (this == obj) return true;
-
-        if (!(obj instanceof TetherLimitKey)) return false;
-
-        final TetherLimitKey that = (TetherLimitKey) obj;
-
-        return ifindex == that.ifindex;
-    }
-
-    @Override
-    public int hashCode() {
-        return Integer.hashCode(ifindex);
-    }
-
-    @Override
-    public String toString() {
-        return String.format("ifindex: %d", ifindex);
-    }
 }
diff --git a/Tethering/src/com/android/networkstack/tethering/TetherLimitValue.java b/Tethering/src/com/android/networkstack/tethering/TetherLimitValue.java
index ed7e7d4..00dfcc6 100644
--- a/Tethering/src/com/android/networkstack/tethering/TetherLimitValue.java
+++ b/Tethering/src/com/android/networkstack/tethering/TetherLimitValue.java
@@ -32,26 +32,4 @@
     public TetherLimitValue(final long limit) {
         this.limit = limit;
     }
-
-    // TODO: remove equals, hashCode and toString once aosp/1536721 is merged.
-    @Override
-    public boolean equals(Object obj) {
-        if (this == obj) return true;
-
-        if (!(obj instanceof TetherLimitValue)) return false;
-
-        final TetherLimitValue that = (TetherLimitValue) obj;
-
-        return limit == that.limit;
-    }
-
-    @Override
-    public int hashCode() {
-        return Long.hashCode(limit);
-    }
-
-    @Override
-    public String toString() {
-        return String.format("limit: %d", limit);
-    }
 }
diff --git a/Tethering/tests/integration/src/android/net/EthernetTetheringTest.java b/Tethering/tests/integration/src/android/net/EthernetTetheringTest.java
index 7ea6f0c..c61b6eb 100644
--- a/Tethering/tests/integration/src/android/net/EthernetTetheringTest.java
+++ b/Tethering/tests/integration/src/android/net/EthernetTetheringTest.java
@@ -27,20 +27,33 @@
 import static android.net.TetheringManager.CONNECTIVITY_SCOPE_LOCAL;
 import static android.net.TetheringManager.TETHERING_ETHERNET;
 import static android.net.TetheringTester.TestDnsPacket;
-import static android.net.TetheringTester.isExpectedIcmpv6Packet;
+import static android.net.TetheringTester.isExpectedIcmpPacket;
+import static android.net.TetheringTester.isExpectedTcpPacket;
 import static android.net.TetheringTester.isExpectedUdpDnsPacket;
 import static android.net.TetheringTester.isExpectedUdpPacket;
+import static android.system.OsConstants.ICMP_ECHO;
+import static android.system.OsConstants.ICMP_ECHOREPLY;
+import static android.system.OsConstants.IPPROTO_ICMP;
 import static android.system.OsConstants.IPPROTO_IP;
 import static android.system.OsConstants.IPPROTO_IPV6;
+import static android.system.OsConstants.IPPROTO_TCP;
 import static android.system.OsConstants.IPPROTO_UDP;
 
 import static com.android.net.module.util.ConnectivityUtils.isIPv6ULA;
 import static com.android.net.module.util.HexDump.dumpHexString;
+import static com.android.net.module.util.IpUtils.icmpChecksum;
+import static com.android.net.module.util.IpUtils.ipChecksum;
 import static com.android.net.module.util.NetworkStackConstants.ETHER_TYPE_IPV4;
 import static com.android.net.module.util.NetworkStackConstants.ETHER_TYPE_IPV6;
 import static com.android.net.module.util.NetworkStackConstants.ICMPV6_ECHO_REPLY_TYPE;
 import static com.android.net.module.util.NetworkStackConstants.ICMPV6_ECHO_REQUEST_TYPE;
 import static com.android.net.module.util.NetworkStackConstants.ICMPV6_ROUTER_ADVERTISEMENT;
+import static com.android.net.module.util.NetworkStackConstants.ICMP_CHECKSUM_OFFSET;
+import static com.android.net.module.util.NetworkStackConstants.IPV4_CHECKSUM_OFFSET;
+import static com.android.net.module.util.NetworkStackConstants.IPV4_HEADER_MIN_LEN;
+import static com.android.net.module.util.NetworkStackConstants.IPV4_LENGTH_OFFSET;
+import static com.android.net.module.util.NetworkStackConstants.TCPHDR_ACK;
+import static com.android.net.module.util.NetworkStackConstants.TCPHDR_SYN;
 import static com.android.testutils.DeviceInfoUtils.KVersion;
 import static com.android.testutils.TestNetworkTrackerKt.initTestNetwork;
 import static com.android.testutils.TestPermissionUtil.runAsShell;
@@ -88,6 +101,8 @@
 import com.android.net.module.util.bpf.Tether4Value;
 import com.android.net.module.util.bpf.TetherStatsKey;
 import com.android.net.module.util.bpf.TetherStatsValue;
+import com.android.net.module.util.structs.EthernetHeader;
+import com.android.net.module.util.structs.Icmpv4Header;
 import com.android.net.module.util.structs.Ipv4Header;
 import com.android.net.module.util.structs.Ipv6Header;
 import com.android.net.module.util.structs.UdpHeader;
@@ -167,8 +182,11 @@
             (Inet6Address) parseNumericAddress("2002:db8:1::515:ca");
     private static final ByteBuffer TEST_REACHABILITY_PAYLOAD =
             ByteBuffer.wrap(new byte[] { (byte) 0x55, (byte) 0xaa });
+    private static final ByteBuffer EMPTY_PAYLOAD = ByteBuffer.wrap(new byte[0]);
 
     private static final short DNS_PORT = 53;
+    private static final short WINDOW = (short) 0x2000;
+    private static final short URGENT_POINTER = 0;
 
     private static final String DUMPSYS_TETHERING_RAWMAP_ARG = "bpfRawMap";
     private static final String DUMPSYS_RAWMAP_ARG_STATS = "--stats";
@@ -179,6 +197,10 @@
     private static final int VERSION_TRAFFICCLASS_FLOWLABEL = 0x60000000;
     private static final short HOP_LIMIT = 0x40;
 
+    private static final short ICMPECHO_CODE = 0x0;
+    private static final short ICMPECHO_ID = 0x0;
+    private static final short ICMPECHO_SEQ = 0x0;
+
     // TODO: use class DnsPacket to build DNS query and reply message once DnsPacket supports
     // building packet for given arguments.
     private static final ByteBuffer DNS_QUERY = ByteBuffer.wrap(new byte[] {
@@ -450,7 +472,10 @@
         final long deadline = SystemClock.uptimeMillis() + timeoutMs;
         do {
             byte[] pkt = reader.popPacket(timeoutMs);
-            if (isExpectedIcmpv6Packet(pkt, true /* hasEth */, ICMPV6_ROUTER_ADVERTISEMENT)) return;
+            if (isExpectedIcmpPacket(pkt, true /* hasEth */, false /* isIpv4 */,
+                    ICMPV6_ROUTER_ADVERTISEMENT)) {
+                return;
+            }
 
             timeoutMs = deadline - SystemClock.uptimeMillis();
         } while (timeoutMs > 0);
@@ -971,14 +996,16 @@
         tester.verifyUpload(request, p -> {
             Log.d(TAG, "Packet in upstream: " + dumpHexString(p));
 
-            return isExpectedIcmpv6Packet(p, false /* hasEth */, ICMPV6_ECHO_REQUEST_TYPE);
+            return isExpectedIcmpPacket(p, false /* hasEth */, false /* isIpv4 */,
+                    ICMPV6_ECHO_REQUEST_TYPE);
         });
 
         ByteBuffer reply = Ipv6Utils.buildEchoReplyPacket(remoteIp6Addr, tethered.ipv6Addr);
         tester.verifyDownload(reply, p -> {
             Log.d(TAG, "Packet in downstream: " + dumpHexString(p));
 
-            return isExpectedIcmpv6Packet(p, true /* hasEth */, ICMPV6_ECHO_REPLY_TYPE);
+            return isExpectedIcmpPacket(p, true /* hasEth */, false /* isIpv4 */,
+                    ICMPV6_ECHO_REPLY_TYPE);
         });
     }
 
@@ -1009,26 +1036,21 @@
     private static final ByteBuffer TX_PAYLOAD =
             ByteBuffer.wrap(new byte[] { (byte) 0x56, (byte) 0x78 });
 
+    private short getEthType(@NonNull final InetAddress srcIp, @NonNull final InetAddress dstIp) {
+        return isAddressIpv4(srcIp, dstIp) ? (short) ETHER_TYPE_IPV4 : (short) ETHER_TYPE_IPV6;
+    }
+
+    private int getIpProto(@NonNull final InetAddress srcIp, @NonNull final InetAddress dstIp) {
+        return isAddressIpv4(srcIp, dstIp) ? IPPROTO_IP : IPPROTO_IPV6;
+    }
+
     @NonNull
     private ByteBuffer buildUdpPacket(
             @Nullable final MacAddress srcMac, @Nullable final MacAddress dstMac,
             @NonNull final InetAddress srcIp, @NonNull final InetAddress dstIp,
             short srcPort, short dstPort, @Nullable final ByteBuffer payload)
             throws Exception {
-        int ipProto;
-        short ethType;
-        if (srcIp instanceof Inet4Address && dstIp instanceof Inet4Address) {
-            ipProto = IPPROTO_IP;
-            ethType = (short) ETHER_TYPE_IPV4;
-        } else if (srcIp instanceof Inet6Address && dstIp instanceof Inet6Address) {
-            ipProto = IPPROTO_IPV6;
-            ethType = (short) ETHER_TYPE_IPV6;
-        } else {
-            fail("Unsupported conditions: srcIp " + srcIp + ", dstIp " + dstIp);
-            // Make compiler happy to the uninitialized ipProto and ethType.
-            return null;  // unreachable, the annotation @NonNull of function return value is true.
-        }
-
+        final int ipProto = getIpProto(srcIp, dstIp);
         final boolean hasEther = (srcMac != null && dstMac != null);
         final int payloadLen = (payload == null) ? 0 : payload.limit();
         final ByteBuffer buffer = PacketBuilder.allocate(hasEther, ipProto, IPPROTO_UDP,
@@ -1036,7 +1058,9 @@
         final PacketBuilder packetBuilder = new PacketBuilder(buffer);
 
         // [1] Ethernet header
-        if (hasEther) packetBuilder.writeL2Header(srcMac, dstMac, (short) ethType);
+        if (hasEther) {
+            packetBuilder.writeL2Header(srcMac, dstMac, getEthType(srcIp, dstIp));
+        }
 
         // [2] IP header
         if (ipProto == IPPROTO_IP) {
@@ -1513,12 +1537,156 @@
         // TODO: test CLAT bpf maps.
     }
 
+    // TODO: support R device. See b/234727688.
     @Test
     @IgnoreUpTo(Build.VERSION_CODES.R)
     public void testTetherClatUdp() throws Exception {
         runClatUdpTest();
     }
 
+    // PacketBuilder doesn't support IPv4 ICMP packet. It may need to refactor PacketBuilder first
+    // because ICMP is a specific layer 3 protocol for PacketBuilder which expects packets always
+    // have layer 3 (IP) and layer 4 (TCP, UDP) for now. Since we don't use IPv4 ICMP packet too
+    // much in this test, we just write a ICMP packet builder here.
+    // TODO: move ICMPv4 packet build function to common utilis.
+    @NonNull
+    private ByteBuffer buildIcmpEchoPacketV4(
+            @Nullable final MacAddress srcMac, @Nullable final MacAddress dstMac,
+            @NonNull final Inet4Address srcIp, @NonNull final Inet4Address dstIp,
+            int type, short id, short seq) throws Exception {
+        if (type != ICMP_ECHO && type != ICMP_ECHOREPLY) {
+            fail("Unsupported ICMP type: " + type);
+        }
+
+        // Build ICMP echo id and seq fields as payload. Ignore the data field.
+        final ByteBuffer payload = ByteBuffer.allocate(4);
+        payload.putShort(id);
+        payload.putShort(seq);
+        payload.rewind();
+
+        final boolean hasEther = (srcMac != null && dstMac != null);
+        final int etherHeaderLen = hasEther ? Struct.getSize(EthernetHeader.class) : 0;
+        final int ipv4HeaderLen = Struct.getSize(Ipv4Header.class);
+        final int Icmpv4HeaderLen = Struct.getSize(Icmpv4Header.class);
+        final int payloadLen = payload.limit();
+        final ByteBuffer packet = ByteBuffer.allocate(etherHeaderLen + ipv4HeaderLen
+                + Icmpv4HeaderLen + payloadLen);
+
+        // [1] Ethernet header
+        if (hasEther) {
+            final EthernetHeader ethHeader = new EthernetHeader(dstMac, srcMac, ETHER_TYPE_IPV4);
+            ethHeader.writeToByteBuffer(packet);
+        }
+
+        // [2] IP header
+        final Ipv4Header ipv4Header = new Ipv4Header(TYPE_OF_SERVICE,
+                (short) 0 /* totalLength, calculate later */, ID,
+                FLAGS_AND_FRAGMENT_OFFSET, TIME_TO_LIVE, (byte) IPPROTO_ICMP,
+                (short) 0 /* checksum, calculate later */, srcIp, dstIp);
+        ipv4Header.writeToByteBuffer(packet);
+
+        // [3] ICMP header
+        final Icmpv4Header icmpv4Header = new Icmpv4Header((byte) type, ICMPECHO_CODE,
+                (short) 0 /* checksum, calculate later */);
+        icmpv4Header.writeToByteBuffer(packet);
+
+        // [4] Payload
+        packet.put(payload);
+        packet.flip();
+
+        // [5] Finalize packet
+        // Used for updating IP header fields. If there is Ehternet header, IPv4 header offset
+        // in buffer equals ethernet header length because IPv4 header is located next to ethernet
+        // header. Otherwise, IPv4 header offset is 0.
+        final int ipv4HeaderOffset = hasEther ? etherHeaderLen : 0;
+
+        // Populate the IPv4 totalLength field.
+        packet.putShort(ipv4HeaderOffset + IPV4_LENGTH_OFFSET,
+                (short) (ipv4HeaderLen + Icmpv4HeaderLen + payloadLen));
+
+        // Populate the IPv4 header checksum field.
+        packet.putShort(ipv4HeaderOffset + IPV4_CHECKSUM_OFFSET,
+                ipChecksum(packet, ipv4HeaderOffset /* headerOffset */));
+
+        // Populate the ICMP checksum field.
+        packet.putShort(ipv4HeaderOffset + IPV4_HEADER_MIN_LEN + ICMP_CHECKSUM_OFFSET,
+                icmpChecksum(packet, ipv4HeaderOffset + IPV4_HEADER_MIN_LEN,
+                        Icmpv4HeaderLen + payloadLen));
+        return packet;
+    }
+
+    @NonNull
+    private ByteBuffer buildIcmpEchoPacketV4(@NonNull final Inet4Address srcIp,
+            @NonNull final Inet4Address dstIp, int type, short id, short seq)
+            throws Exception {
+        return buildIcmpEchoPacketV4(null /* srcMac */, null /* dstMac */, srcIp, dstIp,
+                type, id, seq);
+    }
+
+    @Test
+    public void testIcmpv4Echo() throws Exception {
+        final TetheringTester tester = initTetheringTester(toList(TEST_IP4_ADDR),
+                toList(TEST_IP4_DNS));
+        final TetheredDevice tethered = tester.createTetheredDevice(TEST_MAC, false /* hasIpv6 */);
+
+        // TODO: remove the connectivity verification for upstream connected notification race.
+        // See the same reason in runUdp4Test().
+        probeV4TetheringConnectivity(tester, tethered, false /* is4To6 */);
+
+        final ByteBuffer request = buildIcmpEchoPacketV4(tethered.macAddr /* srcMac */,
+                tethered.routerMacAddr /* dstMac */, tethered.ipv4Addr /* srcIp */,
+                REMOTE_IP4_ADDR /* dstIp */, ICMP_ECHO, ICMPECHO_ID, ICMPECHO_SEQ);
+        tester.verifyUpload(request, p -> {
+            Log.d(TAG, "Packet in upstream: " + dumpHexString(p));
+
+            return isExpectedIcmpPacket(p, false /* hasEth */, true /* isIpv4 */, ICMP_ECHO);
+        });
+
+        final ByteBuffer reply = buildIcmpEchoPacketV4(REMOTE_IP4_ADDR /* srcIp*/,
+                (Inet4Address) TEST_IP4_ADDR.getAddress() /* dstIp */, ICMP_ECHOREPLY, ICMPECHO_ID,
+                ICMPECHO_SEQ);
+        tester.verifyDownload(reply, p -> {
+            Log.d(TAG, "Packet in downstream: " + dumpHexString(p));
+
+            return isExpectedIcmpPacket(p, true /* hasEth */, true /* isIpv4 */, ICMP_ECHOREPLY);
+        });
+    }
+
+    // TODO: support R device. See b/234727688.
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testTetherClatIcmp() throws Exception {
+        // CLAT only starts on IPv6 only network.
+        final TetheringTester tester = initTetheringTester(toList(TEST_IP6_ADDR),
+                toList(TEST_IP6_DNS));
+        final TetheredDevice tethered = tester.createTetheredDevice(TEST_MAC, true /* hasIpv6 */);
+
+        // Get CLAT IPv6 address.
+        final Inet6Address clatIp6 = getClatIpv6Address(tester, tethered);
+
+        // Send an IPv4 ICMP packet in original direction.
+        // IPv4 packet -- CLAT translation --> IPv6 packet
+        final ByteBuffer request = buildIcmpEchoPacketV4(tethered.macAddr /* srcMac */,
+                tethered.routerMacAddr /* dstMac */, tethered.ipv4Addr /* srcIp */,
+                (Inet4Address) REMOTE_IP4_ADDR /* dstIp */, ICMP_ECHO, ICMPECHO_ID, ICMPECHO_SEQ);
+        tester.verifyUpload(request, p -> {
+            Log.d(TAG, "Packet in upstream: " + dumpHexString(p));
+
+            return isExpectedIcmpPacket(p, false /* hasEth */, false /* isIpv4 */,
+                    ICMPV6_ECHO_REQUEST_TYPE);
+        });
+
+        // Send an IPv6 ICMP packet in reply direction.
+        // IPv6 packet -- CLAT translation --> IPv4 packet
+        final ByteBuffer reply = Ipv6Utils.buildEchoReplyPacket(
+                (Inet6Address) REMOTE_NAT64_ADDR /* srcIp */, clatIp6 /* dstIp */);
+        tester.verifyDownload(reply, p -> {
+            Log.d(TAG, "Packet in downstream: " + dumpHexString(p));
+
+            return isExpectedIcmpPacket(p, true /* hasEth */, true /* isIpv4 */, ICMP_ECHOREPLY);
+        });
+    }
+
     @NonNull
     private ByteBuffer buildDnsReplyMessageById(short id) {
         byte[] replyMessage = Arrays.copyOf(DNS_REPLY, DNS_REPLY.length);
@@ -1607,6 +1775,192 @@
                 (short) udpHeader.srcPort, (short) dnsQuery.getHeader().getId(), tester);
     }
 
+    @NonNull
+    private ByteBuffer buildTcpPacket(
+            @Nullable final MacAddress srcMac, @Nullable final MacAddress dstMac,
+            @NonNull final InetAddress srcIp, @NonNull final InetAddress dstIp,
+            short srcPort, short dstPort, final short seq, final short ack,
+            final byte tcpFlags, @NonNull final ByteBuffer payload) throws Exception {
+        final int ipProto = getIpProto(srcIp, dstIp);
+        final boolean hasEther = (srcMac != null && dstMac != null);
+        final ByteBuffer buffer = PacketBuilder.allocate(hasEther, ipProto, IPPROTO_TCP,
+                payload.limit());
+        final PacketBuilder packetBuilder = new PacketBuilder(buffer);
+
+        // [1] Ethernet header
+        if (hasEther) {
+            packetBuilder.writeL2Header(srcMac, dstMac, getEthType(srcIp, dstIp));
+        }
+
+        // [2] IP header
+        if (ipProto == IPPROTO_IP) {
+            packetBuilder.writeIpv4Header(TYPE_OF_SERVICE, ID, FLAGS_AND_FRAGMENT_OFFSET,
+                    TIME_TO_LIVE, (byte) IPPROTO_TCP, (Inet4Address) srcIp, (Inet4Address) dstIp);
+        } else {
+            packetBuilder.writeIpv6Header(VERSION_TRAFFICCLASS_FLOWLABEL, (byte) IPPROTO_TCP,
+                    HOP_LIMIT, (Inet6Address) srcIp, (Inet6Address) dstIp);
+        }
+
+        // [3] TCP header
+        packetBuilder.writeTcpHeader(srcPort, dstPort, seq, ack, tcpFlags, WINDOW, URGENT_POINTER);
+
+        // [4] Payload
+        buffer.put(payload);
+        // in case data might be reused by caller, restore the position and
+        // limit of bytebuffer.
+        payload.clear();
+
+        return packetBuilder.finalizePacket();
+    }
+
+    private void sendDownloadPacketTcp(@NonNull final InetAddress srcIp,
+            @NonNull final InetAddress dstIp, short seq, short ack, byte tcpFlags,
+            @NonNull final ByteBuffer payload, @NonNull final TetheringTester tester,
+            boolean is6To4) throws Exception {
+        if (is6To4) {
+            assertFalse("CLAT download test must sends IPv6 packet", isAddressIpv4(srcIp, dstIp));
+        }
+
+        // Expected received TCP packet IP protocol. While testing CLAT (is6To4 = true), the packet
+        // on downstream must be IPv4. Otherwise, the IP protocol of test packet is the same on
+        // both downstream and upstream.
+        final boolean isIpv4 = is6To4 ? true : isAddressIpv4(srcIp, dstIp);
+
+        final ByteBuffer testPacket = buildTcpPacket(null /* srcMac */, null /* dstMac */,
+                srcIp, dstIp, REMOTE_PORT /* srcPort */, LOCAL_PORT /* dstPort */, seq, ack,
+                tcpFlags, payload);
+        tester.verifyDownload(testPacket, p -> {
+            Log.d(TAG, "Packet in downstream: " + dumpHexString(p));
+
+            return isExpectedTcpPacket(p, true /* hasEther */, isIpv4, seq, payload);
+        });
+    }
+
+    private void sendUploadPacketTcp(@NonNull final MacAddress srcMac,
+            @NonNull final MacAddress dstMac, @NonNull final InetAddress srcIp,
+            @NonNull final InetAddress dstIp, short seq, short ack, byte tcpFlags,
+            @NonNull final ByteBuffer payload, @NonNull final TetheringTester tester,
+            boolean is4To6) throws Exception {
+        if (is4To6) {
+            assertTrue("CLAT upload test must sends IPv4 packet", isAddressIpv4(srcIp, dstIp));
+        }
+
+        // Expected received TCP packet IP protocol. While testing CLAT (is4To6 = true), the packet
+        // on upstream must be IPv6. Otherwise, the IP protocol of test packet is the same on
+        // both downstream and upstream.
+        final boolean isIpv4 = is4To6 ? false : isAddressIpv4(srcIp, dstIp);
+
+        final ByteBuffer testPacket = buildTcpPacket(srcMac, dstMac, srcIp, dstIp,
+                LOCAL_PORT /* srcPort */, REMOTE_PORT /* dstPort */, seq, ack, tcpFlags,
+                payload);
+        tester.verifyUpload(testPacket, p -> {
+            Log.d(TAG, "Packet in upstream: " + dumpHexString(p));
+
+            return isExpectedTcpPacket(p, false /* hasEther */, isIpv4, seq, payload);
+        });
+    }
+
+    void runTcpTest(
+            @NonNull final MacAddress uploadSrcMac, @NonNull final MacAddress uploadDstMac,
+            @NonNull final InetAddress uploadSrcIp, @NonNull final InetAddress uploadDstIp,
+            @NonNull final InetAddress downloadSrcIp, @NonNull final InetAddress downloadDstIp,
+            @NonNull final TetheringTester tester, boolean isClat) throws Exception {
+        // Three way handshake and data transfer.
+        //
+        // Server (base seq = 2000)                                  Client (base seq = 1000)
+        //   |                                                          |
+        //   |    [1] [SYN] SEQ = 1000                                  |
+        //   |<---------------------------------------------------------|  -
+        //   |                                                          |  ^
+        //   |    [2] [SYN + ACK] SEQ = 2000, ACK = 1000+1              |  |
+        //   |--------------------------------------------------------->|  three way handshake
+        //   |                                                          |  |
+        //   |    [3] [ACK] SEQ = 1001, ACK = 2000+1                    |  v
+        //   |<---------------------------------------------------------|  -
+        //   |                                                          |  ^
+        //   |    [4] [ACK] SEQ = 1001, ACK = 2001, 2 byte payload      |  |
+        //   |<---------------------------------------------------------|  data transfer
+        //   |                                                          |  |
+        //   |    [5] [ACK] SEQ = 2001, ACK = 1001+2, 2 byte payload    |  v
+        //   |--------------------------------------------------------->|  -
+        //   |                                                          |
+        //
+
+        // This test can only verify the packets are transferred end to end but TCP state.
+        // TODO: verify TCP state change via /proc/net/nf_conntrack or netlink conntrack event.
+        // [1] [UPLOAD] [SYN]: SEQ = 1000
+        sendUploadPacketTcp(uploadSrcMac, uploadDstMac, uploadSrcIp, uploadDstIp,
+                (short) 1000 /* seq */, (short) 0 /* ack */, TCPHDR_SYN, EMPTY_PAYLOAD,
+                tester, isClat /* is4To6 */);
+
+        // [2] [DONWLOAD] [SYN + ACK]: SEQ = 2000, ACK = 1001
+        sendDownloadPacketTcp(downloadSrcIp, downloadDstIp, (short) 2000 /* seq */,
+                (short) 1001 /* ack */, (byte) ((TCPHDR_SYN | TCPHDR_ACK) & 0xff), EMPTY_PAYLOAD,
+                tester, isClat /* is6To4 */);
+
+        // [3] [UPLOAD] [ACK]: SEQ = 1001, ACK = 2001
+        sendUploadPacketTcp(uploadSrcMac, uploadDstMac, uploadSrcIp, uploadDstIp,
+                (short) 1001 /* seq */, (short) 2001 /* ack */, TCPHDR_ACK, EMPTY_PAYLOAD, tester,
+                isClat /* is4To6 */);
+
+        // [4] [UPLOAD] [ACK]: SEQ = 1001, ACK = 2001, 2 byte payload
+        sendUploadPacketTcp(uploadSrcMac, uploadDstMac, uploadSrcIp, uploadDstIp,
+                (short) 1001 /* seq */, (short) 2001 /* ack */, TCPHDR_ACK, TX_PAYLOAD,
+                tester, isClat /* is4To6 */);
+
+        // [5] [DONWLOAD] [ACK]: SEQ = 2001, ACK = 1003, 2 byte payload
+        sendDownloadPacketTcp(downloadSrcIp, downloadDstIp, (short) 2001 /* seq */,
+                (short) 1003 /* ack */, TCPHDR_ACK, RX_PAYLOAD, tester, isClat /* is6To4 */);
+
+        // TODO: test BPF offload maps.
+    }
+
+    @Test
+    public void testTetherTcpV4() throws Exception {
+        final TetheringTester tester = initTetheringTester(toList(TEST_IP4_ADDR),
+                toList(TEST_IP4_DNS));
+        final TetheredDevice tethered = tester.createTetheredDevice(TEST_MAC, false /* hasIpv6 */);
+
+        // TODO: remove the connectivity verification for upstream connected notification race.
+        // See the same reason in runUdp4Test().
+        probeV4TetheringConnectivity(tester, tethered, false /* is4To6 */);
+
+        runTcpTest(tethered.macAddr /* uploadSrcMac */, tethered.routerMacAddr /* uploadDstMac */,
+                tethered.ipv4Addr /* uploadSrcIp */, REMOTE_IP4_ADDR /* uploadDstIp */,
+                REMOTE_IP4_ADDR /* downloadSrcIp */, TEST_IP4_ADDR.getAddress() /* downloadDstIp */,
+                tester, false /* isClat */);
+    }
+
+    @Test
+    public void testTetherTcpV6() throws Exception {
+        final TetheringTester tester = initTetheringTester(toList(TEST_IP6_ADDR),
+                toList(TEST_IP6_DNS));
+        final TetheredDevice tethered = tester.createTetheredDevice(TEST_MAC, true /* hasIpv6 */);
+
+        runTcpTest(tethered.macAddr /* uploadSrcMac */, tethered.routerMacAddr /* uploadDstMac */,
+                tethered.ipv6Addr /* uploadSrcIp */, REMOTE_IP6_ADDR /* uploadDstIp */,
+                REMOTE_IP6_ADDR /* downloadSrcIp */, tethered.ipv6Addr /* downloadDstIp */,
+                tester, false /* isClat */);
+    }
+
+    // TODO: support R device. See b/234727688.
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testTetherClatTcp() throws Exception {
+        // CLAT only starts on IPv6 only network.
+        final TetheringTester tester = initTetheringTester(toList(TEST_IP6_ADDR),
+                toList(TEST_IP6_DNS));
+        final TetheredDevice tethered = tester.createTetheredDevice(TEST_MAC, true /* hasIpv6 */);
+
+        // Get CLAT IPv6 address.
+        final Inet6Address clatIp6 = getClatIpv6Address(tester, tethered);
+
+        runTcpTest(tethered.macAddr /* uploadSrcMac */, tethered.routerMacAddr /* uploadDstMac */,
+                tethered.ipv4Addr /* uploadSrcIp */, REMOTE_IP4_ADDR /* uploadDstIp */,
+                REMOTE_NAT64_ADDR /* downloadSrcIp */, clatIp6 /* downloadDstIp */,
+                tester, true /* isClat */);
+    }
+
     private <T> List<T> toList(T... array) {
         return Arrays.asList(array);
     }
diff --git a/Tethering/tests/integration/src/android/net/TetheringTester.java b/Tethering/tests/integration/src/android/net/TetheringTester.java
index 9cc2e49..ae39b24 100644
--- a/Tethering/tests/integration/src/android/net/TetheringTester.java
+++ b/Tethering/tests/integration/src/android/net/TetheringTester.java
@@ -17,7 +17,9 @@
 package android.net;
 
 import static android.net.InetAddresses.parseNumericAddress;
+import static android.system.OsConstants.IPPROTO_ICMP;
 import static android.system.OsConstants.IPPROTO_ICMPV6;
+import static android.system.OsConstants.IPPROTO_TCP;
 import static android.system.OsConstants.IPPROTO_UDP;
 
 import static com.android.net.module.util.DnsPacket.ANSECTION;
@@ -39,6 +41,7 @@
 import static com.android.net.module.util.NetworkStackConstants.IPV6_ADDR_ALL_NODES_MULTICAST;
 import static com.android.net.module.util.NetworkStackConstants.NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE;
 import static com.android.net.module.util.NetworkStackConstants.NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED;
+import static com.android.net.module.util.NetworkStackConstants.TCPHDR_SYN;
 
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.fail;
@@ -57,6 +60,7 @@
 import com.android.net.module.util.Ipv6Utils;
 import com.android.net.module.util.Struct;
 import com.android.net.module.util.structs.EthernetHeader;
+import com.android.net.module.util.structs.Icmpv4Header;
 import com.android.net.module.util.structs.Icmpv6Header;
 import com.android.net.module.util.structs.Ipv4Header;
 import com.android.net.module.util.structs.Ipv6Header;
@@ -64,6 +68,7 @@
 import com.android.net.module.util.structs.NsHeader;
 import com.android.net.module.util.structs.PrefixInformationOption;
 import com.android.net.module.util.structs.RaHeader;
+import com.android.net.module.util.structs.TcpHeader;
 import com.android.net.module.util.structs.UdpHeader;
 import com.android.networkstack.arp.ArpPacket;
 import com.android.testutils.TapPacketReader;
@@ -268,7 +273,8 @@
 
     private List<PrefixInformationOption> getRaPrefixOptions(byte[] packet) {
         ByteBuffer buf = ByteBuffer.wrap(packet);
-        if (!isExpectedIcmpv6Packet(buf, true /* hasEth */, ICMPV6_ROUTER_ADVERTISEMENT)) {
+        if (!isExpectedIcmpPacket(buf, true /* hasEth */, false /* isIpv4 */,
+                ICMPV6_ROUTER_ADVERTISEMENT)) {
             fail("Parsing RA packet fail");
         }
 
@@ -298,7 +304,8 @@
         sendRsPacket(srcMac, dstMac);
 
         final byte[] raPacket = verifyPacketNotNull("Receive RA fail", getDownloadPacket(p -> {
-            return isExpectedIcmpv6Packet(p, true /* hasEth */, ICMPV6_ROUTER_ADVERTISEMENT);
+            return isExpectedIcmpPacket(p, true /* hasEth */, false /* isIpv4 */,
+                    ICMPV6_ROUTER_ADVERTISEMENT);
         }));
 
         final List<PrefixInformationOption> options = getRaPrefixOptions(raPacket);
@@ -360,20 +367,27 @@
         }
     }
 
-    public static boolean isExpectedIcmpv6Packet(byte[] packet, boolean hasEth, int type) {
+    public static boolean isExpectedIcmpPacket(byte[] packet, boolean hasEth, boolean isIpv4,
+            int type) {
         final ByteBuffer buf = ByteBuffer.wrap(packet);
-        return isExpectedIcmpv6Packet(buf, hasEth, type);
+        return isExpectedIcmpPacket(buf, hasEth, isIpv4, type);
     }
 
-    private static boolean isExpectedIcmpv6Packet(ByteBuffer buf, boolean hasEth, int type) {
+    private static boolean isExpectedIcmpPacket(ByteBuffer buf, boolean hasEth, boolean isIpv4,
+            int type) {
         try {
-            if (hasEth && !hasExpectedEtherHeader(buf, false /* isIpv4 */)) return false;
+            if (hasEth && !hasExpectedEtherHeader(buf, isIpv4)) return false;
 
-            if (!hasExpectedIpHeader(buf, false /* isIpv4 */, IPPROTO_ICMPV6)) return false;
+            final int ipProto = isIpv4 ? IPPROTO_ICMP : IPPROTO_ICMPV6;
+            if (!hasExpectedIpHeader(buf, isIpv4, ipProto)) return false;
 
-            return Struct.parse(Icmpv6Header.class, buf).type == (short) type;
+            if (isIpv4) {
+                return Struct.parse(Icmpv4Header.class, buf).type == (short) type;
+            } else {
+                return Struct.parse(Icmpv6Header.class, buf).type == (short) type;
+            }
         } catch (Exception e) {
-            // Parsing packet fail means it is not icmpv6 packet.
+            // Parsing packet fail means it is not icmp packet.
         }
 
         return false;
@@ -578,6 +592,42 @@
         return true;
     }
 
+
+    private static boolean isTcpSynPacket(@NonNull final TcpHeader tcpHeader) {
+        return (tcpHeader.dataOffsetAndControlBits & TCPHDR_SYN) != 0;
+    }
+
+    public static boolean isExpectedTcpPacket(@NonNull final byte[] rawPacket, boolean hasEth,
+            boolean isIpv4, int seq, @NonNull final ByteBuffer payload) {
+        final ByteBuffer buf = ByteBuffer.wrap(rawPacket);
+        try {
+            if (hasEth && !hasExpectedEtherHeader(buf, isIpv4)) return false;
+
+            if (!hasExpectedIpHeader(buf, isIpv4, IPPROTO_TCP)) return false;
+
+            final TcpHeader tcpHeader = Struct.parse(TcpHeader.class, buf);
+            if (tcpHeader.seq != seq) return false;
+
+            // Don't try to parse the payload if it is a TCP SYN segment because additional TCP
+            // option MSS may be added in the SYN segment. Currently, TetherController uses
+            // iptables to limit downstream MSS for IPv4. The additional TCP options will be
+            // misunderstood as payload because parsing TCP options are not supported by class
+            // TcpHeader for now. See TetherController::setupIptablesHooks.
+            // TODO: remove once TcpHeader supports parsing TCP options.
+            if (isTcpSynPacket(tcpHeader)) {
+                Log.d(TAG, "Found SYN segment. Ignore parsing the remaining part of packet.");
+                return true;
+            }
+
+            if (payload.limit() != buf.remaining()) return false;
+            return Arrays.equals(getRemaining(buf), getRemaining(payload.asReadOnlyBuffer()));
+        } catch (Exception e) {
+            // Parsing packet fail means it is not tcp packet.
+        }
+
+        return false;
+    }
+
     private void sendUploadPacket(ByteBuffer packet) throws Exception {
         mDownstreamReader.sendResponse(packet);
     }
diff --git a/Tethering/tests/unit/src/android/net/ip/IpServerTest.java b/Tethering/tests/unit/src/android/net/ip/IpServerTest.java
index f242227..5f4454b 100644
--- a/Tethering/tests/unit/src/android/net/ip/IpServerTest.java
+++ b/Tethering/tests/unit/src/android/net/ip/IpServerTest.java
@@ -271,6 +271,7 @@
                 mTestAddress);
     }
 
+    @SuppressWarnings("DoNotCall") // Ignore warning for synchronous to call to Thread.run()
     private void setUpDhcpServer() throws Exception {
         doAnswer(inv -> {
             final IDhcpServerCallbacks cb = inv.getArgument(2);
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java
index a36d67f..a468d82 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java
@@ -399,6 +399,7 @@
                     MacAddress.ALL_ZEROS_ADDRESS);
         }
 
+        @SuppressWarnings("DoNotCall") // Ignore warning for synchronous to call to Thread.run()
         @Override
         public void makeDhcpServer(String ifName, DhcpServingParamsParcel params,
                 DhcpServerCallbacks cb) {
diff --git a/common/src/com/android/net/module/util/bpf/ClatEgress4Key.java b/common/src/com/android/net/module/util/bpf/ClatEgress4Key.java
index 12200ec..f0af3dd 100644
--- a/common/src/com/android/net/module/util/bpf/ClatEgress4Key.java
+++ b/common/src/com/android/net/module/util/bpf/ClatEgress4Key.java
@@ -24,13 +24,13 @@
 
 /** Key type for clat egress IPv4 maps. */
 public class ClatEgress4Key extends Struct {
-    @Field(order = 0, type = Type.U32)
-    public final long iif; // The input interface index
+    @Field(order = 0, type = Type.S32)
+    public final int iif; // The input interface index
 
     @Field(order = 1, type = Type.Ipv4Address)
     public final Inet4Address local4; // The source IPv4 address
 
-    public ClatEgress4Key(final long iif, final Inet4Address local4) {
+    public ClatEgress4Key(final int iif, final Inet4Address local4) {
         this.iif = iif;
         this.local4 = local4;
     }
diff --git a/common/src/com/android/net/module/util/bpf/ClatEgress4Value.java b/common/src/com/android/net/module/util/bpf/ClatEgress4Value.java
index c10cb4d..69fab09 100644
--- a/common/src/com/android/net/module/util/bpf/ClatEgress4Value.java
+++ b/common/src/com/android/net/module/util/bpf/ClatEgress4Value.java
@@ -24,8 +24,8 @@
 
 /** Value type for clat egress IPv4 maps. */
 public class ClatEgress4Value extends Struct {
-    @Field(order = 0, type = Type.U32)
-    public final long oif; // The output interface to redirect to
+    @Field(order = 0, type = Type.S32)
+    public final int oif; // The output interface to redirect to
 
     @Field(order = 1, type = Type.Ipv6Address)
     public final Inet6Address local6; // The full 128-bits of the source IPv6 address
@@ -36,7 +36,7 @@
     @Field(order = 3, type = Type.U8, padding = 3)
     public final short oifIsEthernet; // Whether the output interface requires ethernet header
 
-    public ClatEgress4Value(final long oif, final Inet6Address local6, final Inet6Address pfx96,
+    public ClatEgress4Value(final int oif, final Inet6Address local6, final Inet6Address pfx96,
             final short oifIsEthernet) {
         this.oif = oif;
         this.local6 = local6;
diff --git a/common/src/com/android/net/module/util/bpf/ClatIngress6Key.java b/common/src/com/android/net/module/util/bpf/ClatIngress6Key.java
index 1e2f4e0..561113c 100644
--- a/common/src/com/android/net/module/util/bpf/ClatIngress6Key.java
+++ b/common/src/com/android/net/module/util/bpf/ClatIngress6Key.java
@@ -24,8 +24,8 @@
 
 /** Key type for clat ingress IPv6 maps. */
 public class ClatIngress6Key extends Struct {
-    @Field(order = 0, type = Type.U32)
-    public final long iif; // The input interface index
+    @Field(order = 0, type = Type.S32)
+    public final int iif; // The input interface index
 
     @Field(order = 1, type = Type.Ipv6Address)
     public final Inet6Address pfx96; // The source /96 nat64 prefix, bottom 32 bits must be 0
@@ -33,7 +33,7 @@
     @Field(order = 2, type = Type.Ipv6Address)
     public final Inet6Address local6; // The full 128-bits of the destination IPv6 address
 
-    public ClatIngress6Key(final long iif, final Inet6Address pfx96, final Inet6Address local6) {
+    public ClatIngress6Key(final int iif, final Inet6Address pfx96, final Inet6Address local6) {
         this.iif = iif;
         this.pfx96 = pfx96;
         this.local6 = local6;
diff --git a/common/src/com/android/net/module/util/bpf/ClatIngress6Value.java b/common/src/com/android/net/module/util/bpf/ClatIngress6Value.java
index bfec44f..fb81caa 100644
--- a/common/src/com/android/net/module/util/bpf/ClatIngress6Value.java
+++ b/common/src/com/android/net/module/util/bpf/ClatIngress6Value.java
@@ -24,13 +24,13 @@
 
 /** Value type for clat ingress IPv6 maps. */
 public class ClatIngress6Value extends Struct {
-    @Field(order = 0, type = Type.U32)
-    public final long oif; // The output interface to redirect to (0 means don't redirect)
+    @Field(order = 0, type = Type.S32)
+    public final int oif; // The output interface to redirect to (0 means don't redirect)
 
     @Field(order = 1, type = Type.Ipv4Address)
     public final Inet4Address local4; // The destination IPv4 address
 
-    public ClatIngress6Value(final long oif, final Inet4Address local4) {
+    public ClatIngress6Value(final int oif, final Inet4Address local4) {
         this.oif = oif;
         this.local4 = local4;
     }
diff --git a/common/src/com/android/net/module/util/bpf/CookieTagMapValue.java b/common/src/com/android/net/module/util/bpf/CookieTagMapValue.java
index e1a221f..3fbd6fc 100644
--- a/common/src/com/android/net/module/util/bpf/CookieTagMapValue.java
+++ b/common/src/com/android/net/module/util/bpf/CookieTagMapValue.java
@@ -24,13 +24,13 @@
  * Value for cookie tag map.
  */
 public class CookieTagMapValue extends Struct {
-    @Field(order = 0, type = Type.U32)
-    public final long uid;
+    @Field(order = 0, type = Type.S32)
+    public final int uid;
 
     @Field(order = 1, type = Type.U32)
     public final long tag;
 
-    public CookieTagMapValue(final long uid, final long tag) {
+    public CookieTagMapValue(final int uid, final long tag) {
         this.uid = uid;
         this.tag = tag;
     }
diff --git a/common/src/com/android/net/module/util/bpf/TetherStatsKey.java b/common/src/com/android/net/module/util/bpf/TetherStatsKey.java
index c6d595b..68111b6 100644
--- a/common/src/com/android/net/module/util/bpf/TetherStatsKey.java
+++ b/common/src/com/android/net/module/util/bpf/TetherStatsKey.java
@@ -22,32 +22,10 @@
 
 /** The key of BpfMap which is used for tethering stats. */
 public class TetherStatsKey extends Struct {
-    @Field(order = 0, type = Type.U32)
-    public final long ifindex;  // upstream interface index
+    @Field(order = 0, type = Type.S32)
+    public final int ifindex;  // upstream interface index
 
-    public TetherStatsKey(final long ifindex) {
+    public TetherStatsKey(final int ifindex) {
         this.ifindex = ifindex;
     }
-
-    // TODO: remove equals, hashCode and toString once aosp/1536721 is merged.
-    @Override
-    public boolean equals(Object obj) {
-        if (this == obj) return true;
-
-        if (!(obj instanceof TetherStatsKey)) return false;
-
-        final TetherStatsKey that = (TetherStatsKey) obj;
-
-        return ifindex == that.ifindex;
-    }
-
-    @Override
-    public int hashCode() {
-        return Long.hashCode(ifindex);
-    }
-
-    @Override
-    public String toString() {
-        return String.format("ifindex: %d", ifindex);
-    }
 }
diff --git a/common/src/com/android/net/module/util/bpf/TetherStatsValue.java b/common/src/com/android/net/module/util/bpf/TetherStatsValue.java
index 028d217..f05d1b7 100644
--- a/common/src/com/android/net/module/util/bpf/TetherStatsValue.java
+++ b/common/src/com/android/net/module/util/bpf/TetherStatsValue.java
@@ -47,34 +47,4 @@
         this.txBytes = txBytes;
         this.txErrors = txErrors;
     }
-
-    // TODO: remove equals, hashCode and toString once aosp/1536721 is merged.
-    @Override
-    public boolean equals(Object obj) {
-        if (this == obj) return true;
-
-        if (!(obj instanceof TetherStatsValue)) return false;
-
-        final TetherStatsValue that = (TetherStatsValue) obj;
-
-        return rxPackets == that.rxPackets
-                && rxBytes == that.rxBytes
-                && rxErrors == that.rxErrors
-                && txPackets == that.txPackets
-                && txBytes == that.txBytes
-                && txErrors == that.txErrors;
-    }
-
-    @Override
-    public int hashCode() {
-        return Long.hashCode(rxPackets) ^ Long.hashCode(rxBytes) ^ Long.hashCode(rxErrors)
-                ^ Long.hashCode(txPackets) ^ Long.hashCode(txBytes) ^ Long.hashCode(txErrors);
-    }
-
-    @Override
-    public String toString() {
-        return String.format("rxPackets: %s, rxBytes: %s, rxErrors: %s, txPackets: %s, "
-                + "txBytes: %s, txErrors: %s", rxPackets, rxBytes, rxErrors, txPackets,
-                txBytes, txErrors);
-    }
 }
diff --git a/framework/src/android/net/util/MultinetworkPolicyTracker.java b/framework/src/android/net/util/MultinetworkPolicyTracker.java
index c1790c9..2dcf932 100644
--- a/framework/src/android/net/util/MultinetworkPolicyTracker.java
+++ b/framework/src/android/net/util/MultinetworkPolicyTracker.java
@@ -109,8 +109,6 @@
         this(ctx, handler, null);
     }
 
-    // TODO: Set the mini sdk to 31 and remove @TargetApi annotation when b/205923322 is addressed.
-    @TargetApi(Build.VERSION_CODES.S)
     public MultinetworkPolicyTracker(Context ctx, Handler handler, Runnable avoidBadWifiCallback) {
         mContext = ctx;
         mResources = new ConnectivityResources(ctx);
@@ -128,13 +126,12 @@
             }
         };
 
-        ctx.getSystemService(TelephonyManager.class).registerTelephonyCallback(
-                new HandlerExecutor(handler), new ActiveDataSubscriptionIdListener());
-
         updateAvoidBadWifi();
         updateMeteredMultipathPreference();
     }
 
+    // TODO: Set the mini sdk to 31 and remove @TargetApi annotation when b/205923322 is addressed.
+    @TargetApi(Build.VERSION_CODES.S)
     public void start() {
         for (Uri uri : mSettingsUris) {
             mResolver.registerContentObserver(uri, false, mSettingObserver);
@@ -145,6 +142,9 @@
         mContext.registerReceiverForAllUsers(mBroadcastReceiver, intentFilter,
                 null /* broadcastPermission */, mHandler);
 
+        mContext.getSystemService(TelephonyManager.class).registerTelephonyCallback(
+                new HandlerExecutor(mHandler), new ActiveDataSubscriptionIdListener());
+
         reevaluate();
     }
 
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/DataElementTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/DataElementTest.java
index ec6e89a..3654d0d 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/DataElementTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/DataElementTest.java
@@ -36,7 +36,7 @@
 @RequiresApi(Build.VERSION_CODES.TIRAMISU)
 public class DataElementTest {
 
-    private static final int KEY = 1234;
+    private static final int KEY = 1;
     private static final byte[] VALUE = new byte[]{1, 1, 1, 1};
 
     @Test
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceParcelableTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceParcelableTest.java
index dd9cbb0..654b852 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceParcelableTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceParcelableTest.java
@@ -22,7 +22,6 @@
 
 import android.nearby.NearbyDevice;
 import android.nearby.NearbyDeviceParcelable;
-import android.nearby.PublicCredential;
 import android.os.Build;
 import android.os.Parcel;
 
@@ -60,32 +59,6 @@
                         .setData(SCAN_DATA);
     }
 
-    /** Verify toString returns expected string. */
-    @Test
-    @SdkSuppress(minSdkVersion = 33, codeName = "T")
-    public void testToString() {
-        PublicCredential publicCredential =
-                new PublicCredential.Builder(
-                                new byte[] {1},
-                                new byte[] {2},
-                                new byte[] {3},
-                                new byte[] {4},
-                                new byte[] {5})
-                        .build();
-        NearbyDeviceParcelable nearbyDeviceParcelable =
-                mBuilder.setFastPairModelId(null)
-                        .setData(null)
-                        .setPublicCredential(publicCredential)
-                        .build();
-
-        assertThat(nearbyDeviceParcelable.toString())
-                .isEqualTo(
-                        "NearbyDeviceParcelable[scanType=2, name=testDevice, medium=BLE, "
-                                + "txPower=0, rssi=-60, action=0, bluetoothAddress="
-                                + BLUETOOTH_ADDRESS
-                                + ", fastPairModelId=null, data=null, salt=null]");
-    }
-
     @Test
     @SdkSuppress(minSdkVersion = 33, codeName = "T")
     public void test_defaultNullFields() {
diff --git a/service-t/src/com/android/server/ethernet/EthernetTracker.java b/service-t/src/com/android/server/ethernet/EthernetTracker.java
index 00dff5b..6ec478b 100644
--- a/service-t/src/com/android/server/ethernet/EthernetTracker.java
+++ b/service-t/src/com/android/server/ethernet/EthernetTracker.java
@@ -622,31 +622,32 @@
         // restarted while it was running), we need to fake a link up notification so we
         // start configuring it.
         if (NetdUtils.hasFlag(config, INetd.IF_FLAG_RUNNING)) {
-            updateInterfaceState(iface, true);
+            // no need to send an interface state change as this is not a true "state change". The
+            // callers (maybeTrackInterface() and setTetheringInterfaceMode()) already broadcast the
+            // state change.
+            mFactory.updateInterfaceLinkState(iface, true);
         }
     }
 
     private void updateInterfaceState(String iface, boolean up) {
-        // TODO: pull EthernetCallbacks out of EthernetNetworkFactory.
         updateInterfaceState(iface, up, new EthernetCallback(null /* cb */));
     }
 
-    private void updateInterfaceState(@NonNull final String iface, final boolean up,
-            @Nullable final EthernetCallback cb) {
+    // TODO(b/225315248): enable/disableInterface() should not affect link state.
+    private void updateInterfaceState(String iface, boolean up, EthernetCallback cb) {
         final int mode = getInterfaceMode(iface);
-        final boolean factoryLinkStateUpdated = (mode == INTERFACE_MODE_CLIENT)
-                && mFactory.updateInterfaceLinkState(iface, up);
-
-        if (factoryLinkStateUpdated) {
-            broadcastInterfaceStateChange(iface);
-            cb.onResult(iface);
-        } else {
-            // The interface may already be in the correct state. While usually this should not be
-            // an error, since updateInterfaceState is used in setInterfaceEnabled() /
-            // setInterfaceDisabled() it has to be reported as such.
-            // It is also possible that the interface disappeared or is in server mode.
+        if (mode == INTERFACE_MODE_SERVER || !mFactory.hasInterface(iface)) {
+            // The interface is in server mode or is not tracked.
             cb.onError("Failed to set link state " + (up ? "up" : "down") + " for " + iface);
+            return;
         }
+
+        if (mFactory.updateInterfaceLinkState(iface, up)) {
+            broadcastInterfaceStateChange(iface);
+        }
+        // If updateInterfaceLinkState returns false, the interface is already in the correct state.
+        // Always return success.
+        cb.onResult(iface);
     }
 
     private void maybeUpdateServerModeInterfaceState(String iface, boolean available) {
diff --git a/service-t/src/com/android/server/net/BpfInterfaceMapUpdater.java b/service-t/src/com/android/server/net/BpfInterfaceMapUpdater.java
index 57466a6..ceae9ba 100644
--- a/service-t/src/com/android/server/net/BpfInterfaceMapUpdater.java
+++ b/service-t/src/com/android/server/net/BpfInterfaceMapUpdater.java
@@ -31,7 +31,7 @@
 import com.android.net.module.util.BpfMap;
 import com.android.net.module.util.IBpfMap;
 import com.android.net.module.util.InterfaceParams;
-import com.android.net.module.util.Struct.U32;
+import com.android.net.module.util.Struct.S32;
 
 /**
  * Monitor interface added (without removed) and right interface name and its index to bpf map.
@@ -41,7 +41,7 @@
     // This is current path but may be changed soon.
     private static final String IFACE_INDEX_NAME_MAP_PATH =
             "/sys/fs/bpf/netd_shared/map_netd_iface_index_name_map";
-    private final IBpfMap<U32, InterfaceMapValue> mBpfMap;
+    private final IBpfMap<S32, InterfaceMapValue> mBpfMap;
     private final INetd mNetd;
     private final Handler mHandler;
     private final Dependencies mDeps;
@@ -64,10 +64,10 @@
     @VisibleForTesting
     public static class Dependencies {
         /** Create BpfMap for updating interface and index mapping. */
-        public IBpfMap<U32, InterfaceMapValue> getInterfaceMap() {
+        public IBpfMap<S32, InterfaceMapValue> getInterfaceMap() {
             try {
                 return new BpfMap<>(IFACE_INDEX_NAME_MAP_PATH, BpfMap.BPF_F_RDWR,
-                    U32.class, InterfaceMapValue.class);
+                    S32.class, InterfaceMapValue.class);
             } catch (ErrnoException e) {
                 Log.e(TAG, "Cannot create interface map: " + e);
                 return null;
@@ -126,7 +126,7 @@
         }
 
         try {
-            mBpfMap.updateEntry(new U32(iface.index), new InterfaceMapValue(ifaceName));
+            mBpfMap.updateEntry(new S32(iface.index), new InterfaceMapValue(ifaceName));
         } catch (ErrnoException e) {
             Log.e(TAG, "Unable to update entry for " + ifaceName + ", " + e);
         }
@@ -140,9 +140,9 @@
     }
 
     /** get interface name by interface index from bpf map */
-    public String getIfNameByIndex(final long index) {
+    public String getIfNameByIndex(final int index) {
         try {
-            final InterfaceMapValue value = mBpfMap.getValue(new U32(index));
+            final InterfaceMapValue value = mBpfMap.getValue(new S32(index));
             if (value == null) {
                 Log.e(TAG, "No if name entry for index " + index);
                 return null;
diff --git a/service-t/src/com/android/server/net/NetworkStatsService.java b/service-t/src/com/android/server/net/NetworkStatsService.java
index 807f5d7..0da7b6f 100644
--- a/service-t/src/com/android/server/net/NetworkStatsService.java
+++ b/service-t/src/com/android/server/net/NetworkStatsService.java
@@ -164,7 +164,7 @@
 import com.android.net.module.util.PermissionUtils;
 import com.android.net.module.util.SharedLog;
 import com.android.net.module.util.Struct;
-import com.android.net.module.util.Struct.U32;
+import com.android.net.module.util.Struct.S32;
 import com.android.net.module.util.Struct.U8;
 import com.android.net.module.util.bpf.CookieTagMapKey;
 import com.android.net.module.util.bpf.CookieTagMapValue;
@@ -408,7 +408,7 @@
      * mActiveUidCounterSet to avoid accessing kernel too frequently.
      */
     private SparseIntArray mActiveUidCounterSet = new SparseIntArray();
-    private final IBpfMap<U32, U8> mUidCounterSetMap;
+    private final IBpfMap<S32, U8> mUidCounterSetMap;
     private final IBpfMap<CookieTagMapKey, CookieTagMapValue> mCookieTagMap;
     private final IBpfMap<StatsMapKey, StatsMapValue> mStatsMapA;
     private final IBpfMap<StatsMapKey, StatsMapValue> mStatsMapB;
@@ -741,10 +741,10 @@
         }
 
         /** Get counter sets map for each UID. */
-        public IBpfMap<U32, U8> getUidCounterSetMap() {
+        public IBpfMap<S32, U8> getUidCounterSetMap() {
             try {
-                return new BpfMap<U32, U8>(UID_COUNTERSET_MAP_PATH, BpfMap.BPF_F_RDWR,
-                        U32.class, U8.class);
+                return new BpfMap<S32, U8>(UID_COUNTERSET_MAP_PATH, BpfMap.BPF_F_RDWR,
+                        S32.class, U8.class);
             } catch (ErrnoException e) {
                 Log.wtf(TAG, "Cannot open uid counter set map: " + e);
                 return null;
@@ -1747,7 +1747,7 @@
 
         if (set == SET_DEFAULT) {
             try {
-                mUidCounterSetMap.deleteEntry(new U32(uid));
+                mUidCounterSetMap.deleteEntry(new S32(uid));
             } catch (ErrnoException e) {
                 Log.w(TAG, "UidCounterSetMap.deleteEntry(" + uid + ") failed with errno: " + e);
             }
@@ -1755,7 +1755,7 @@
         }
 
         try {
-            mUidCounterSetMap.updateEntry(new U32(uid), new U8((short) set));
+            mUidCounterSetMap.updateEntry(new S32(uid), new U8((short) set));
         } catch (ErrnoException e) {
             Log.w(TAG, "UidCounterSetMap.updateEntry(" + uid + ", " + set
                     + ") failed with errno: " + e);
@@ -2472,7 +2472,7 @@
         deleteStatsMapTagData(mStatsMapB, uid);
 
         try {
-            mUidCounterSetMap.deleteEntry(new U32(uid));
+            mUidCounterSetMap.deleteEntry(new S32(uid));
         } catch (ErrnoException e) {
             logErrorIfNotErrNoent(e, "Failed to delete tag data from uid counter set map");
         }
@@ -2896,9 +2896,8 @@
         BpfDump.dumpMap(statsMap, pw, mapName,
                 "ifaceIndex ifaceName tag_hex uid_int cnt_set rxBytes rxPackets txBytes txPackets",
                 (key, value) -> {
-                    final long ifIndex = key.ifaceIndex;
-                    final String ifName = mInterfaceMapUpdater.getIfNameByIndex(ifIndex);
-                    return ifIndex + " "
+                    final String ifName = mInterfaceMapUpdater.getIfNameByIndex(key.ifaceIndex);
+                    return key.ifaceIndex + " "
                             + (ifName != null ? ifName : "unknown") + " "
                             + "0x" + Long.toHexString(key.tag) + " "
                             + key.uid + " "
diff --git a/service-t/src/com/android/server/net/StatsMapKey.java b/service-t/src/com/android/server/net/StatsMapKey.java
index ea8d836..44269b3 100644
--- a/service-t/src/com/android/server/net/StatsMapKey.java
+++ b/service-t/src/com/android/server/net/StatsMapKey.java
@@ -24,8 +24,8 @@
  * Key for both stats maps.
  */
 public class StatsMapKey extends Struct {
-    @Field(order = 0, type = Type.U32)
-    public final long uid;
+    @Field(order = 0, type = Type.S32)
+    public final int uid;
 
     @Field(order = 1, type = Type.U32)
     public final long tag;
@@ -33,11 +33,11 @@
     @Field(order = 2, type = Type.U32)
     public final long counterSet;
 
-    @Field(order = 3, type = Type.U32)
-    public final long ifaceIndex;
+    @Field(order = 3, type = Type.S32)
+    public final int ifaceIndex;
 
-    public StatsMapKey(final long uid, final long tag, final long counterSet,
-            final long ifaceIndex) {
+    public StatsMapKey(final int uid, final long tag, final long counterSet,
+            final int ifaceIndex) {
         this.uid = uid;
         this.tag = tag;
         this.counterSet = counterSet;
diff --git a/service-t/src/com/android/server/net/UidStatsMapKey.java b/service-t/src/com/android/server/net/UidStatsMapKey.java
index 2849f94..59025fd 100644
--- a/service-t/src/com/android/server/net/UidStatsMapKey.java
+++ b/service-t/src/com/android/server/net/UidStatsMapKey.java
@@ -24,10 +24,10 @@
  * Key for uid stats map.
  */
 public class UidStatsMapKey extends Struct {
-    @Field(order = 0, type = Type.U32)
-    public final long uid;
+    @Field(order = 0, type = Type.S32)
+    public final int uid;
 
-    public UidStatsMapKey(final long uid) {
+    public UidStatsMapKey(final int uid) {
         this.uid = uid;
     }
 }
diff --git a/service/src/com/android/server/BpfNetMaps.java b/service/src/com/android/server/BpfNetMaps.java
index 758c013..dbfc383 100644
--- a/service/src/com/android/server/BpfNetMaps.java
+++ b/service/src/com/android/server/BpfNetMaps.java
@@ -54,6 +54,7 @@
 import com.android.net.module.util.DeviceConfigUtils;
 import com.android.net.module.util.IBpfMap;
 import com.android.net.module.util.Struct;
+import com.android.net.module.util.Struct.S32;
 import com.android.net.module.util.Struct.U32;
 import com.android.net.module.util.Struct.U8;
 import com.android.net.module.util.bpf.CookieTagMapKey;
@@ -105,16 +106,16 @@
             "/sys/fs/bpf/netd_shared/map_netd_uid_permission_map";
     private static final String COOKIE_TAG_MAP_PATH =
             "/sys/fs/bpf/netd_shared/map_netd_cookie_tag_map";
-    private static final U32 UID_RULES_CONFIGURATION_KEY = new U32(0);
-    private static final U32 CURRENT_STATS_MAP_CONFIGURATION_KEY = new U32(1);
+    private static final S32 UID_RULES_CONFIGURATION_KEY = new S32(0);
+    private static final S32 CURRENT_STATS_MAP_CONFIGURATION_KEY = new S32(1);
     private static final long UID_RULES_DEFAULT_CONFIGURATION = 0;
     private static final long STATS_SELECT_MAP_A = 0;
     private static final long STATS_SELECT_MAP_B = 1;
 
-    private static IBpfMap<U32, U32> sConfigurationMap = null;
+    private static IBpfMap<S32, U32> sConfigurationMap = null;
     // BpfMap for UID_OWNER_MAP_PATH. This map is not accessed by others.
-    private static IBpfMap<U32, UidOwnerValue> sUidOwnerMap = null;
-    private static IBpfMap<U32, U8> sUidPermissionMap = null;
+    private static IBpfMap<S32, UidOwnerValue> sUidOwnerMap = null;
+    private static IBpfMap<S32, U8> sUidPermissionMap = null;
     private static IBpfMap<CookieTagMapKey, CookieTagMapValue> sCookieTagMap = null;
 
     // LINT.IfChange(match_type)
@@ -145,7 +146,7 @@
      * Set configurationMap for test.
      */
     @VisibleForTesting
-    public static void setConfigurationMapForTest(IBpfMap<U32, U32> configurationMap) {
+    public static void setConfigurationMapForTest(IBpfMap<S32, U32> configurationMap) {
         sConfigurationMap = configurationMap;
     }
 
@@ -153,7 +154,7 @@
      * Set uidOwnerMap for test.
      */
     @VisibleForTesting
-    public static void setUidOwnerMapForTest(IBpfMap<U32, UidOwnerValue> uidOwnerMap) {
+    public static void setUidOwnerMapForTest(IBpfMap<S32, UidOwnerValue> uidOwnerMap) {
         sUidOwnerMap = uidOwnerMap;
     }
 
@@ -161,7 +162,7 @@
      * Set uidPermissionMap for test.
      */
     @VisibleForTesting
-    public static void setUidPermissionMapForTest(IBpfMap<U32, U8> uidPermissionMap) {
+    public static void setUidPermissionMapForTest(IBpfMap<S32, U8> uidPermissionMap) {
         sUidPermissionMap = uidPermissionMap;
     }
 
@@ -174,28 +175,28 @@
         sCookieTagMap = cookieTagMap;
     }
 
-    private static IBpfMap<U32, U32> getConfigurationMap() {
+    private static IBpfMap<S32, U32> getConfigurationMap() {
         try {
             return new BpfMap<>(
-                    CONFIGURATION_MAP_PATH, BpfMap.BPF_F_RDWR, U32.class, U32.class);
+                    CONFIGURATION_MAP_PATH, BpfMap.BPF_F_RDWR, S32.class, U32.class);
         } catch (ErrnoException e) {
             throw new IllegalStateException("Cannot open netd configuration map", e);
         }
     }
 
-    private static IBpfMap<U32, UidOwnerValue> getUidOwnerMap() {
+    private static IBpfMap<S32, UidOwnerValue> getUidOwnerMap() {
         try {
             return new BpfMap<>(
-                    UID_OWNER_MAP_PATH, BpfMap.BPF_F_RDWR, U32.class, UidOwnerValue.class);
+                    UID_OWNER_MAP_PATH, BpfMap.BPF_F_RDWR, S32.class, UidOwnerValue.class);
         } catch (ErrnoException e) {
             throw new IllegalStateException("Cannot open uid owner map", e);
         }
     }
 
-    private static IBpfMap<U32, U8> getUidPermissionMap() {
+    private static IBpfMap<S32, U8> getUidPermissionMap() {
         try {
             return new BpfMap<>(
-                    UID_PERMISSION_MAP_PATH, BpfMap.BPF_F_RDWR, U32.class, U8.class);
+                    UID_PERMISSION_MAP_PATH, BpfMap.BPF_F_RDWR, S32.class, U8.class);
         } catch (ErrnoException e) {
             throw new IllegalStateException("Cannot open uid permission map", e);
         }
@@ -389,7 +390,7 @@
     private void removeRule(final int uid, final long match, final String caller) {
         try {
             synchronized (sUidOwnerMap) {
-                final UidOwnerValue oldMatch = sUidOwnerMap.getValue(new U32(uid));
+                final UidOwnerValue oldMatch = sUidOwnerMap.getValue(new S32(uid));
 
                 if (oldMatch == null) {
                     throw new ServiceSpecificException(ENOENT,
@@ -402,9 +403,9 @@
                 );
 
                 if (newMatch.rule == 0) {
-                    sUidOwnerMap.deleteEntry(new U32(uid));
+                    sUidOwnerMap.deleteEntry(new S32(uid));
                 } else {
-                    sUidOwnerMap.updateEntry(new U32(uid), newMatch);
+                    sUidOwnerMap.updateEntry(new S32(uid), newMatch);
                 }
             }
         } catch (ErrnoException e) {
@@ -413,7 +414,7 @@
         }
     }
 
-    private void addRule(final int uid, final long match, final long iif, final String caller) {
+    private void addRule(final int uid, final long match, final int iif, final String caller) {
         if (match != IIF_MATCH && iif != 0) {
             throw new ServiceSpecificException(EINVAL,
                     "Non-interface match must have zero interface index");
@@ -421,7 +422,7 @@
 
         try {
             synchronized (sUidOwnerMap) {
-                final UidOwnerValue oldMatch = sUidOwnerMap.getValue(new U32(uid));
+                final UidOwnerValue oldMatch = sUidOwnerMap.getValue(new S32(uid));
 
                 final UidOwnerValue newMatch;
                 if (oldMatch != null) {
@@ -435,7 +436,7 @@
                             match
                     );
                 }
-                sUidOwnerMap.updateEntry(new U32(uid), newMatch);
+                sUidOwnerMap.updateEntry(new S32(uid), newMatch);
             }
         } catch (ErrnoException e) {
             throw new ServiceSpecificException(e.errno,
@@ -855,7 +856,7 @@
             if (permissions == PERMISSION_UNINSTALLED || permissions == PERMISSION_INTERNET) {
                 for (final int uid : uids) {
                     try {
-                        sUidPermissionMap.deleteEntry(new U32(uid));
+                        sUidPermissionMap.deleteEntry(new S32(uid));
                     } catch (ErrnoException e) {
                         Log.e(TAG, "Failed to remove uid " + uid + " from permission map: " + e);
                     }
@@ -865,7 +866,7 @@
 
             for (final int uid : uids) {
                 try {
-                    sUidPermissionMap.updateEntry(new U32(uid), new U8((short) permissions));
+                    sUidPermissionMap.updateEntry(new S32(uid), new U8((short) permissions));
                 } catch (ErrnoException e) {
                     Log.e(TAG, "Failed to set permission "
                             + permissions + " to uid " + uid + ": " + e);
diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index 8ec979a..93265e5 100755
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -353,6 +353,12 @@
     // connect anyway?" dialog after the user selects a network that doesn't validate.
     private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000;
 
+    // How long to wait before considering that a network is bad in the absence of any form
+    // of connectivity (valid, partial, captive portal). If none has been detected after this
+    // delay, the stack considers this network bad, which may affect how it's handled in ranking
+    // according to config_networkAvoidBadWifi.
+    private static final int INITIAL_EVALUATION_TIMEOUT_MS = 20 * 1000;
+
     // Default to 30s linger time-out, and 5s for nascent network. Modifiable only for testing.
     private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger";
     private static final int DEFAULT_LINGER_DELAY_MS = 30_000;
@@ -581,12 +587,6 @@
     private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28;
 
     /**
-     * used to ask the user to confirm a connection to an unvalidated network.
-     * obj  = network
-     */
-    private static final int EVENT_PROMPT_UNVALIDATED = 29;
-
-    /**
      * used internally to (re)configure always-on networks.
      */
     private static final int EVENT_CONFIGURE_ALWAYS_ON_NETWORKS = 30;
@@ -725,6 +725,14 @@
     private static final int EVENT_INGRESS_RATE_LIMIT_CHANGED = 56;
 
     /**
+     * The initial evaluation period is over for this network.
+     *
+     * If no form of connectivity has been found on this network (valid, partial, captive portal)
+     * then the stack will now consider it to have been determined bad.
+     */
+    private static final int EVENT_INITIAL_EVALUATION_TIMEOUT = 57;
+
+    /**
      * Argument for {@link #EVENT_PROVISIONING_NOTIFICATION} to indicate that the notification
      * should be shown.
      */
@@ -3342,17 +3350,6 @@
         pw.increaseIndent();
         mNetworkActivityTracker.dump(pw);
         pw.decreaseIndent();
-
-        // pre-T is logged by netd.
-        if (SdkLevel.isAtLeastT()) {
-            pw.println();
-            pw.println("BPF programs & maps:");
-            pw.increaseIndent();
-            // Flush is required. Otherwise, the traces in fd can interleave with traces in pw.
-            pw.flush();
-            dumpTrafficController(pw, fd, /*verbose=*/ true);
-            pw.decreaseIndent();
-        }
     }
 
     private void dumpNetworks(IndentingPrintWriter pw) {
@@ -3791,7 +3788,17 @@
 
         private void handleNetworkTested(
                 @NonNull NetworkAgentInfo nai, int testResult, @NonNull String redirectUrl) {
-            final boolean valid = ((testResult & NETWORK_VALIDATION_RESULT_VALID) != 0);
+            final boolean valid = (testResult & NETWORK_VALIDATION_RESULT_VALID) != 0;
+            final boolean partial = (testResult & NETWORK_VALIDATION_RESULT_PARTIAL) != 0;
+            final boolean captive = !TextUtils.isEmpty(redirectUrl);
+
+            // If there is any kind of working networking, then the NAI has been evaluated
+            // once. {@see NetworkAgentInfo#setEvaluated}, which returns whether this is
+            // the first time this ever happened.
+            final boolean someConnectivity = (valid || partial || captive);
+            final boolean becameEvaluated = someConnectivity && nai.setEvaluated();
+            if (becameEvaluated) nai.updateScoreForNetworkAgentUpdate();
+
             if (!valid && shouldIgnoreValidationFailureAfterRoam(nai)) {
                 // Assume the validation failure is due to a temporary failure after roaming
                 // and ignore it. NetworkMonitor will continue to retry validation. If it
@@ -3834,8 +3841,13 @@
                 }
             } else if (partialConnectivityChanged) {
                 updateCapabilitiesForNetwork(nai);
+            } else if (becameEvaluated) {
+                // If valid or partial connectivity changed, updateCapabilities* has
+                // done the rematch.
+                rematchAllNetworksAndRequests();
             }
             updateInetCondition(nai);
+
             // Let the NetworkAgent know the state of its network
             // TODO: Evaluate to update partial connectivity to status to NetworkAgent.
             nai.onValidationStatusChanged(
@@ -3843,13 +3855,13 @@
                     redirectUrl);
 
             // If NetworkMonitor detects partial connectivity before
-            // EVENT_PROMPT_UNVALIDATED arrives, show the partial connectivity notification
+            // EVENT_INITIAL_EVALUATION_TIMEOUT arrives, show the partial connectivity notification
             // immediately. Re-notify partial connectivity silently if no internet
             // notification already there.
             if (!wasPartial && nai.partialConnectivity()) {
                 // Remove delayed message if there is a pending message.
-                mHandler.removeMessages(EVENT_PROMPT_UNVALIDATED, nai.network);
-                handlePromptUnvalidated(nai.network);
+                mHandler.removeMessages(EVENT_INITIAL_EVALUATION_TIMEOUT, nai.network);
+                handleInitialEvaluationTimeout(nai.network);
             }
 
             if (wasValidated && !nai.isValidated()) {
@@ -4949,16 +4961,11 @@
         }
     }
 
-    private void scheduleUnvalidatedPrompt(@NonNull final Network network) {
-        scheduleUnvalidatedPrompt(network, PROMPT_UNVALIDATED_DELAY_MS);
-    }
-
-    /** Schedule unvalidated prompt for testing */
+    /** Schedule evaluation timeout */
     @VisibleForTesting
-    public void scheduleUnvalidatedPrompt(@NonNull final Network network, final long delayMs) {
-        if (VDBG) log("scheduleUnvalidatedPrompt " + network);
+    public void scheduleEvaluationTimeout(@NonNull final Network network, final long delayMs) {
         mHandler.sendMessageDelayed(
-                mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, network), delayMs);
+                mHandler.obtainMessage(EVENT_INITIAL_EVALUATION_TIMEOUT, network), delayMs);
     }
 
     @Override
@@ -5193,23 +5200,28 @@
         return false;
     }
 
-    private void handlePromptUnvalidated(Network network) {
-        if (VDBG || DDBG) log("handlePromptUnvalidated " + network);
-        NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);
+    private void handleInitialEvaluationTimeout(@NonNull final Network network) {
+        if (VDBG || DDBG) log("handleInitialEvaluationTimeout " + network);
 
-        if (nai == null || !shouldPromptUnvalidated(nai)) {
-            return;
+        NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);
+        if (null == nai) return;
+
+        if (nai.setEvaluated()) {
+            // If setEvaluated() returned true, the network never had any form of connectivity.
+            // This may have an impact on request matching if bad WiFi avoidance is off and the
+            // network was found not to have Internet access.
+            nai.updateScoreForNetworkAgentUpdate();
+            rematchAllNetworksAndRequests();
         }
 
+        if (!shouldPromptUnvalidated(nai)) return;
+
         // Stop automatically reconnecting to this network in the future. Automatically connecting
         // to a network that provides no or limited connectivity is not useful, because the user
         // cannot use that network except through the notification shown by this method, and the
         // notification is only shown if the network is explicitly selected by the user.
         nai.onPreventAutomaticReconnect();
 
-        // TODO: Evaluate if it's needed to wait 8 seconds for triggering notification when
-        // NetworkMonitor detects the network is partial connectivity. Need to change the design to
-        // popup the notification immediately when the network is partial connectivity.
         if (nai.partialConnectivity()) {
             showNetworkNotification(nai, NotificationType.PARTIAL_CONNECTIVITY);
         } else {
@@ -5348,8 +5360,8 @@
                     handleSetAvoidUnvalidated((Network) msg.obj);
                     break;
                 }
-                case EVENT_PROMPT_UNVALIDATED: {
-                    handlePromptUnvalidated((Network) msg.obj);
+                case EVENT_INITIAL_EVALUATION_TIMEOUT: {
+                    handleInitialEvaluationTimeout((Network) msg.obj);
                     break;
                 }
                 case EVENT_CONFIGURE_ALWAYS_ON_NETWORKS: {
@@ -9213,7 +9225,7 @@
                 networkAgent.networkMonitor().notifyNetworkConnected(params.linkProperties,
                         params.networkCapabilities);
             }
-            scheduleUnvalidatedPrompt(networkAgent.network);
+            scheduleEvaluationTimeout(networkAgent.network, INITIAL_EVALUATION_TIMEOUT_MS);
 
             // Whether a particular NetworkRequest listen should cause signal strength thresholds to
             // be communicated to a particular NetworkAgent depends only on the network's immutable,
@@ -9627,6 +9639,8 @@
             try {
                 switch (cmd) {
                     case "airplane-mode":
+                        // Usage : adb shell cmd connectivity airplane-mode [enable|disable]
+                        // If no argument, get and display the current status
                         final String action = getNextArg();
                         if ("enable".equals(action)) {
                             setAirplaneMode(true);
@@ -9644,6 +9658,27 @@
                             onHelp();
                             return -1;
                         }
+                    case "reevaluate":
+                        // Usage : adb shell cmd connectivity reevaluate <netId>
+                        // If netId is omitted, then reevaluate the default network
+                        final String netId = getNextArg();
+                        final NetworkAgentInfo nai;
+                        if (null == netId) {
+                            // Note that the command is running on the wrong thread to call this,
+                            // so this could in principle return stale data. But it can't crash.
+                            nai = getDefaultNetwork();
+                        } else {
+                            // If netId can't be parsed, this throws NumberFormatException, which
+                            // is passed back to adb who prints it.
+                            nai = getNetworkAgentInfoForNetId(Integer.parseInt(netId));
+                        }
+                        if (null == nai) {
+                            pw.println("Unknown network (net ID not found or no default network)");
+                            return 0;
+                        }
+                        Log.d(TAG, "Reevaluating network " + nai.network);
+                        reportNetworkConnectivity(nai.network, !nai.isValidated());
+                        return 0;
                     default:
                         return handleDefaultCommands(cmd);
                 }
diff --git a/service/src/com/android/server/UidOwnerValue.java b/service/src/com/android/server/UidOwnerValue.java
index f89e354..d6c0e0d 100644
--- a/service/src/com/android/server/UidOwnerValue.java
+++ b/service/src/com/android/server/UidOwnerValue.java
@@ -21,14 +21,14 @@
 /** Value type for per uid traffic control configuration map  */
 public class UidOwnerValue extends Struct {
     // Allowed interface index. Only applicable if IIF_MATCH is set in the rule bitmask below.
-    @Field(order = 0, type = Type.U32)
-    public final long iif;
+    @Field(order = 0, type = Type.S32)
+    public final int iif;
 
     // A bitmask of match type.
     @Field(order = 1, type = Type.U32)
     public final long rule;
 
-    public UidOwnerValue(final long iif, final long rule) {
+    public UidOwnerValue(final int iif, final long rule) {
         this.iif = iif;
         this.rule = rule;
     }
diff --git a/service/src/com/android/server/connectivity/DscpPolicyValue.java b/service/src/com/android/server/connectivity/DscpPolicyValue.java
index fed96b4..7b11eda 100644
--- a/service/src/com/android/server/connectivity/DscpPolicyValue.java
+++ b/service/src/com/android/server/connectivity/DscpPolicyValue.java
@@ -37,8 +37,8 @@
     @Field(order = 1, type = Type.ByteArray, arraysize = 16)
     public final byte[] dst46;
 
-    @Field(order = 2, type = Type.U32)
-    public final long ifIndex;
+    @Field(order = 2, type = Type.S32)
+    public final int ifIndex;
 
     @Field(order = 3, type = Type.UBE16)
     public final int srcPort;
@@ -116,7 +116,7 @@
         return mask;
     }
 
-    private DscpPolicyValue(final InetAddress src46, final InetAddress dst46, final long ifIndex,
+    private DscpPolicyValue(final InetAddress src46, final InetAddress dst46, final int ifIndex,
             final int srcPort, final int dstPortStart, final int dstPortEnd, final short proto,
             final byte dscp) {
         this.src46 = toAddressField(src46);
@@ -136,7 +136,7 @@
         this.mask = makeMask(this.src46, this.dst46, srcPort, dstPortStart, proto, dscp);
     }
 
-    public DscpPolicyValue(final InetAddress src46, final InetAddress dst46, final long ifIndex,
+    public DscpPolicyValue(final InetAddress src46, final InetAddress dst46, final int ifIndex,
             final int srcPort, final Range<Integer> dstPort, final short proto,
             final byte dscp) {
         this(src46, dst46, ifIndex, srcPort, dstPort != null ? dstPort.getLower() : -1,
diff --git a/service/src/com/android/server/connectivity/NetworkAgentInfo.java b/service/src/com/android/server/connectivity/NetworkAgentInfo.java
index a4c70c8..c732170 100644
--- a/service/src/com/android/server/connectivity/NetworkAgentInfo.java
+++ b/service/src/com/android/server/connectivity/NetworkAgentInfo.java
@@ -61,6 +61,7 @@
 import android.util.Pair;
 import android.util.SparseArray;
 
+import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.util.IndentingPrintWriter;
 import com.android.internal.util.WakeupMessage;
 import com.android.modules.utils.build.SdkLevel;
@@ -399,6 +400,12 @@
         return true;
     }
 
+    /** When this network ever concluded its first evaluation, or 0 if this never happened. */
+    @VisibleForTesting
+    public long getFirstEvaluationConcludedTime() {
+        return mFirstEvaluationConcludedTime;
+    }
+
     // Delay between when the network is disconnected and when the native network is destroyed.
     public int teardownDelayMs;
 
diff --git a/tests/common/java/android/net/metrics/IpConnectivityLogTest.java b/tests/common/java/android/net/metrics/IpConnectivityLogTest.java
index ab97f2d..93cf748 100644
--- a/tests/common/java/android/net/metrics/IpConnectivityLogTest.java
+++ b/tests/common/java/android/net/metrics/IpConnectivityLogTest.java
@@ -23,7 +23,7 @@
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
-import static org.mockito.Mockito.timeout;
+import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 
 import android.net.ConnectivityMetricsEvent;
@@ -51,6 +51,7 @@
     private static final int FAKE_NET_ID = 100;
     private static final int[] FAKE_TRANSPORT_TYPES = unpackBits(TRANSPORT_WIFI);
     private static final long FAKE_TIME_STAMP = System.currentTimeMillis();
+    private static final long THREAD_TIMEOUT_MS = 10_000L;
     private static final String FAKE_INTERFACE_NAME = "test";
     private static final IpReachabilityEvent FAKE_EV =
             new IpReachabilityEvent(IpReachabilityEvent.NUD_FAILED);
@@ -93,22 +94,26 @@
 
         final int nCallers = 10;
         final int nEvents = 10;
+        final Thread[] threads = new Thread[nCallers];
         for (int n = 0; n < nCallers; n++) {
             final int i = n;
-            new Thread() {
-                public void run() {
-                    for (int j = 0; j < nEvents; j++) {
-                        assertTrue(logger.log(makeExpectedEvent(
-                                FAKE_TIME_STAMP + i * 100 + j,
-                                FAKE_NET_ID + i * 100 + j,
-                                ((i + j) % 2 == 0) ? TRANSPORT_WIFI : TRANSPORT_CELLULAR,
-                                FAKE_INTERFACE_NAME)));
-                    }
+            threads[i] = new Thread(() -> {
+                for (int j = 0; j < nEvents; j++) {
+                    assertTrue(logger.log(makeExpectedEvent(
+                            FAKE_TIME_STAMP + i * 100 + j,
+                            FAKE_NET_ID + i * 100 + j,
+                            ((i + j) % 2 == 0) ? TRANSPORT_WIFI : TRANSPORT_CELLULAR,
+                            FAKE_INTERFACE_NAME)));
                 }
-            }.start();
+            });
+            threads[i].start();
+        }
+        // To ensure the events have been sent out on each thread. Wait for the thread to die.
+        for (Thread thread : threads) {
+            thread.join(THREAD_TIMEOUT_MS);
         }
 
-        List<ConnectivityMetricsEvent> got = verifyEvents(nCallers * nEvents, 200);
+        final List<ConnectivityMetricsEvent> got = verifyEvents(nCallers * nEvents);
         Collections.sort(got, EVENT_COMPARATOR);
         Iterator<ConnectivityMetricsEvent> iter = got.iterator();
         for (int i = 0; i < nCallers; i++) {
@@ -123,17 +128,13 @@
         }
     }
 
-    private List<ConnectivityMetricsEvent> verifyEvents(int n, int timeoutMs) throws Exception {
+    private List<ConnectivityMetricsEvent> verifyEvents(int n) throws Exception {
         ArgumentCaptor<ConnectivityMetricsEvent> captor =
                 ArgumentCaptor.forClass(ConnectivityMetricsEvent.class);
-        verify(mMockService, timeout(timeoutMs).times(n)).logEvent(captor.capture());
+        verify(mMockService, times(n)).logEvent(captor.capture());
         return captor.getAllValues();
     }
 
-    private List<ConnectivityMetricsEvent> verifyEvents(int n) throws Exception {
-        return verifyEvents(n, 10);
-    }
-
 
     private ConnectivityMetricsEvent makeExpectedEvent(long timestamp, int netId, long transports,
             String ifname) {
diff --git a/tests/cts/OWNERS b/tests/cts/OWNERS
index 875b4a2..089d06f 100644
--- a/tests/cts/OWNERS
+++ b/tests/cts/OWNERS
@@ -1,3 +1,7 @@
 # Bug template url: http://b/new?component=31808
 set noparent
 file:platform/packages/modules/Connectivity:master:/OWNERS_core_networking_xts
+
+# Only temporary ownership to improve ethernet code quality (b/236280707)
+# TODO: remove by 12/31/2022
+per-file net/src/android/net/cts/EthernetManagerTest.kt = prohr@google.com #{LAST_RESORT_SUGGESTION}
diff --git a/tests/cts/net/AndroidManifest.xml b/tests/cts/net/AndroidManifest.xml
index 6b5bb93..25490da 100644
--- a/tests/cts/net/AndroidManifest.xml
+++ b/tests/cts/net/AndroidManifest.xml
@@ -35,6 +35,7 @@
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
     <uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE" />
+    <uses-permission android:name="android.permission.PACKAGE_USAGE_STATS" />
 
     <!-- TODO (b/186093901): remove after fixing resource querying -->
     <uses-permission android:name="android.permission.QUERY_ALL_PACKAGES" />
diff --git a/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
index b21c5b4..f1a6d92 100644
--- a/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
+++ b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
@@ -55,6 +55,7 @@
 import android.os.Handler
 import android.os.Looper
 import android.os.OutcomeReceiver
+import android.os.SystemProperties
 import android.platform.test.annotations.AppModeFull
 import android.util.ArraySet
 import androidx.test.platform.app.InstrumentationRegistry
@@ -68,13 +69,13 @@
 import com.android.testutils.RecorderCallback.CallbackEntry.CapabilitiesChanged
 import com.android.testutils.RecorderCallback.CallbackEntry.Lost
 import com.android.testutils.RouterAdvertisementResponder
-import com.android.testutils.SkipPresubmit
 import com.android.testutils.TapPacketReader
 import com.android.testutils.TestableNetworkCallback
 import com.android.testutils.anyNetwork
 import com.android.testutils.runAsShell
 import com.android.testutils.waitForIdle
 import org.junit.After
+import org.junit.Assume.assumeFalse
 import org.junit.Assume.assumeTrue
 import org.junit.Before
 import org.junit.Ignore
@@ -96,11 +97,11 @@
 import kotlin.test.fail
 
 private const val TAG = "EthernetManagerTest"
-private const val TIMEOUT_MS = 1000L
+private const val TIMEOUT_MS = 2000L
 // Timeout used to confirm no callbacks matching given criteria are received. Must be long enough to
 // process all callbacks including ip provisioning when using the updateConfiguration API.
 // Note that increasing this timeout increases the test duration.
-private const val NO_CALLBACK_TIMEOUT_MS = 200L
+private const val NO_CALLBACK_TIMEOUT_MS = 500L
 
 private val DEFAULT_IP_CONFIGURATION = IpConfiguration(IpConfiguration.IpAssignment.DHCP,
         IpConfiguration.ProxySettings.NONE, null, null)
@@ -119,7 +120,6 @@
 @RunWith(DevSdkIgnoreRunner::class)
 // This test depends on behavior introduced post-T as part of connectivity module updates
 @ConnectivityModuleTest
-@SkipPresubmit(reason = "Flaky: b/240323229; remove annotation after fixing")
 @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.S_V2)
 class EthernetManagerTest {
 
@@ -151,9 +151,11 @@
                 context.getSystemService(TestNetworkManager::class.java)
             }
             tapInterface = runAsShell(MANAGE_TEST_NETWORKS) {
-                // setting RS delay to 0 and disabling DAD speeds up tests.
-                tnm.createTapInterface(hasCarrier, false /* bringUp */,
-                        true /* disableIpv6ProvisioningDelay */)
+                // Configuring a tun/tap interface always enables the carrier. If hasCarrier is
+                // false, it is subsequently disabled. This means that the interface may briefly get
+                // link. With IPv6 provisioning delays (RS delay and DAD) disabled, this can cause
+                // tests that expect no network to come up when hasCarrier is false to become flaky.
+                tnm.createTapInterface(hasCarrier, false /* bringUp */)
             }
             val mtu = tapInterface.mtu
             packetReader = TapPacketReader(handler, tapInterface.fileDescriptor.fileDescriptor, mtu)
@@ -312,10 +314,12 @@
         private val result = CompletableFuture<String>()
 
         override fun onResult(iface: String) {
+            assertFalse(result.isDone())
             result.complete(iface)
         }
 
         override fun onError(e: EthernetNetworkManagementException) {
+            assertFalse(result.isDone())
             result.completeExceptionally(e)
         }
 
@@ -375,6 +379,18 @@
     // Setting the carrier up / down relies on TUNSETCARRIER which was added in kernel version 5.0.
     private fun assumeChangingCarrierSupported() = assumeTrue(isKernelVersionAtLeast("5.0.0"))
 
+    private fun isAdbOverEthernet(): Boolean {
+        // If no ethernet interface is available, adb is not connected over ethernet.
+        if (em.getInterfaceList().isEmpty()) return false
+
+        // cuttlefish is special and does not connect adb over ethernet.
+        if (SystemProperties.get("ro.product.board", "") == "cutf") return false
+
+        // Check if adb is connected over the network.
+        return (SystemProperties.getInt("persist.adb.tcp.port", -1) > -1 ||
+                SystemProperties.getInt("service.adb.tcp.port", -1) > -1)
+    }
+
     private fun addInterfaceStateListener(listener: EthernetStateListener) {
         runAsShell(CONNECTIVITY_USE_RESTRICTED_NETWORKS) {
             em.addInterfaceStateListener(handler::post, listener)
@@ -471,6 +487,7 @@
         }
     }
 
+    // WARNING: check that isAdbOverEthernet() is false before calling setEthernetEnabled(false).
     private fun setEthernetEnabled(enabled: Boolean) {
         runAsShell(NETWORK_SETTINGS) { em.setEthernetEnabled(enabled) }
 
@@ -515,7 +532,7 @@
             it.networkSpecifier == EthernetNetworkSpecifier(name)
         }
 
-    private fun TestableNetworkCallback.expectCapabilitiesWithCapability(cap: Int) =
+    private fun TestableNetworkCallback.expectCapabilitiesWith(cap: Int) =
         expectCapabilitiesThat(anyNetwork(), TIMEOUT_MS) {
             it.hasCapability(cap)
         }
@@ -560,6 +577,25 @@
         }
     }
 
+    @Test
+    fun testCallbacks_withRunningInterface() {
+        // This test disables ethernet, so check that adb is not connected over ethernet.
+        assumeFalse(isAdbOverEthernet())
+        assumeTrue(em.getInterfaceList().isEmpty())
+        val iface = createInterface()
+        val listener = EthernetStateListener()
+        addInterfaceStateListener(listener)
+        listener.eventuallyExpect(iface, STATE_LINK_UP, ROLE_CLIENT)
+
+        // Remove running interface. The interface stays running but is no longer tracked.
+        setEthernetEnabled(false)
+        listener.expectCallback(iface, STATE_ABSENT, ROLE_NONE)
+
+        setEthernetEnabled(true)
+        listener.expectCallback(iface, STATE_LINK_UP, ROLE_CLIENT)
+        listener.assertNoCallback()
+    }
+
     private fun assumeNoInterfaceForTetheringAvailable() {
         // Interfaces that have configured NetworkCapabilities will never be used for tethering,
         // see aosp/2123900.
@@ -804,6 +840,26 @@
     }
 
     @Test
+    fun testEnableDisableInterface_withoutStateChange() {
+        val iface = createInterface()
+        // Interface is already enabled, so enableInterface() should return success
+        enableInterface(iface).expectResult(iface.name)
+
+        disableInterface(iface).expectResult(iface.name)
+        // Interface is already disabled, so disableInterface() should return success.
+        disableInterface(iface).expectResult(iface.name)
+    }
+
+    @Test
+    fun testEnableDisableInterface_withMissingInterface() {
+        val iface = createInterface()
+        removeInterface(iface)
+        // Interface does not exist, enable/disableInterface() should both return an error.
+        enableInterface(iface).expectError()
+        disableInterface(iface).expectError()
+    }
+
+    @Test
     fun testUpdateConfiguration_forBothIpConfigAndCapabilities() {
         val iface = createInterface()
         val cb = requestNetwork(ETH_REQUEST.createCopyWithEthernetSpecifier(iface.name))
@@ -821,14 +877,14 @@
         // will be expected first before available, as part of the restart.
         cb.expectLost(network)
         cb.expectAvailable()
-        cb.expectCapabilitiesWithCapability(testCapability)
+        cb.expectCapabilitiesWith(testCapability)
         cb.expectLinkPropertiesWithLinkAddress(
                 STATIC_IP_CONFIGURATION.staticIpConfiguration.ipAddress!!)
     }
 
     @Test
     fun testUpdateConfiguration_forOnlyIpConfig() {
-        val iface: EthernetTestInterface = createInterface()
+        val iface = createInterface()
         val cb = requestNetwork(ETH_REQUEST.createCopyWithEthernetSpecifier(iface.name))
         val network = cb.expectAvailable()
         cb.assertNeverLost()
@@ -849,7 +905,7 @@
     @Ignore
     @Test
     fun testUpdateConfiguration_forOnlyCapabilities() {
-        val iface: EthernetTestInterface = createInterface()
+        val iface = createInterface()
         val cb = requestNetwork(ETH_REQUEST.createCopyWithEthernetSpecifier(iface.name))
         val network = cb.expectAvailable()
         cb.assertNeverLost()
@@ -865,6 +921,6 @@
         // will be expected first before available, as part of the restart.
         cb.expectLost(network)
         cb.expectAvailable()
-        cb.expectCapabilitiesWithCapability(testCapability)
+        cb.expectCapabilitiesWith(testCapability)
     }
 }
diff --git a/tests/cts/net/util/java/android/net/cts/util/IkeSessionTestUtils.java b/tests/cts/net/util/java/android/net/cts/util/IkeSessionTestUtils.java
index 244bfc5..11eb466 100644
--- a/tests/cts/net/util/java/android/net/cts/util/IkeSessionTestUtils.java
+++ b/tests/cts/net/util/java/android/net/cts/util/IkeSessionTestUtils.java
@@ -27,6 +27,7 @@
 import android.net.InetAddresses;
 import android.net.ipsec.ike.ChildSaProposal;
 import android.net.ipsec.ike.IkeFqdnIdentification;
+import android.net.ipsec.ike.IkeIdentification;
 import android.net.ipsec.ike.IkeIpv4AddrIdentification;
 import android.net.ipsec.ike.IkeIpv6AddrIdentification;
 import android.net.ipsec.ike.IkeSaProposal;
@@ -57,6 +58,11 @@
     }
 
     private static IkeSessionParams getTestIkeSessionParams(boolean testIpv6) {
+        return getTestIkeSessionParams(testIpv6, new IkeFqdnIdentification(TEST_IDENTITY));
+    }
+
+    public static IkeSessionParams getTestIkeSessionParams(boolean testIpv6,
+            IkeIdentification identification) {
         final String testServer = testIpv6 ? TEST_SERVER_ADDR_V6 : TEST_SERVER_ADDR_V4;
         final InetAddress addr = InetAddresses.parseNumericAddress(testServer);
         final IkeSessionParams.Builder ikeOptionsBuilder =
diff --git a/tests/unit/java/android/net/Ikev2VpnProfileTest.java b/tests/unit/java/android/net/Ikev2VpnProfileTest.java
index 2f5b0ab..3b68120 100644
--- a/tests/unit/java/android/net/Ikev2VpnProfileTest.java
+++ b/tests/unit/java/android/net/Ikev2VpnProfileTest.java
@@ -18,6 +18,7 @@
 
 import static android.net.cts.util.IkeSessionTestUtils.CHILD_PARAMS;
 import static android.net.cts.util.IkeSessionTestUtils.IKE_PARAMS_V6;
+import static android.net.cts.util.IkeSessionTestUtils.getTestIkeSessionParams;
 
 import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
 
@@ -28,6 +29,7 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+import android.net.ipsec.ike.IkeKeyIdIdentification;
 import android.net.ipsec.ike.IkeTunnelConnectionParams;
 import android.os.Build;
 import android.test.mock.MockContext;
@@ -446,6 +448,40 @@
     }
 
     @Test
+    public void testBuildWithIkeTunConnParamsConvertToVpnProfile() throws Exception {
+        // Special keyId that contains delimiter character of VpnProfile
+        final byte[] keyId = "foo\0bar".getBytes();
+        final IkeTunnelConnectionParams tunnelParams = new IkeTunnelConnectionParams(
+                getTestIkeSessionParams(true /* testIpv6 */, new IkeKeyIdIdentification(keyId)),
+                CHILD_PARAMS);
+        final Ikev2VpnProfile ikev2VpnProfile = new Ikev2VpnProfile.Builder(tunnelParams).build();
+        final VpnProfile vpnProfile = ikev2VpnProfile.toVpnProfile();
+
+        assertEquals(VpnProfile.TYPE_IKEV2_FROM_IKE_TUN_CONN_PARAMS, vpnProfile.type);
+
+        // Username, password, server, ipsecIdentifier, ipsecCaCert, ipsecSecret, ipsecUserCert and
+        // getAllowedAlgorithms should not be set if IkeTunnelConnectionParams is set.
+        assertEquals("", vpnProfile.server);
+        assertEquals("", vpnProfile.ipsecIdentifier);
+        assertEquals("", vpnProfile.username);
+        assertEquals("", vpnProfile.password);
+        assertEquals("", vpnProfile.ipsecCaCert);
+        assertEquals("", vpnProfile.ipsecSecret);
+        assertEquals("", vpnProfile.ipsecUserCert);
+        assertEquals(0, vpnProfile.getAllowedAlgorithms().size());
+
+        // IkeTunnelConnectionParams should stay the same.
+        assertEquals(tunnelParams, vpnProfile.ikeTunConnParams);
+
+        // Convert to disk-stable format and then back to Ikev2VpnProfile should be the same.
+        final VpnProfile decodedVpnProfile =
+                VpnProfile.decode(vpnProfile.key, vpnProfile.encode());
+        final Ikev2VpnProfile convertedIkev2VpnProfile =
+                Ikev2VpnProfile.fromVpnProfile(decodedVpnProfile);
+        assertEquals(ikev2VpnProfile, convertedIkev2VpnProfile);
+    }
+
+    @Test
     public void testConversionIsLosslessWithIkeTunConnParams() throws Exception {
         final IkeTunnelConnectionParams tunnelParams =
                 new IkeTunnelConnectionParams(IKE_PARAMS_V6, CHILD_PARAMS);
diff --git a/tests/unit/java/android/net/util/MultinetworkPolicyTrackerTest.kt b/tests/unit/java/android/net/util/MultinetworkPolicyTrackerTest.kt
index 576b8d3..0dbee5d 100644
--- a/tests/unit/java/android/net/util/MultinetworkPolicyTrackerTest.kt
+++ b/tests/unit/java/android/net/util/MultinetworkPolicyTrackerTest.kt
@@ -26,6 +26,7 @@
 import android.net.ConnectivitySettingsManager.NETWORK_METERED_MULTIPATH_PREFERENCE
 import android.net.util.MultinetworkPolicyTracker.ActiveDataSubscriptionIdListener
 import android.os.Build
+import android.os.Handler
 import android.provider.Settings
 import android.telephony.SubscriptionInfo
 import android.telephony.SubscriptionManager
@@ -40,6 +41,7 @@
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertFalse
 import org.junit.Assert.assertTrue
+import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.mockito.ArgumentCaptor
@@ -48,6 +50,7 @@
 import org.mockito.ArgumentMatchers.eq
 import org.mockito.Mockito.any
 import org.mockito.Mockito.doCallRealMethod
+import org.mockito.Mockito.doNothing
 import org.mockito.Mockito.doReturn
 import org.mockito.Mockito.mock
 import org.mockito.Mockito.times
@@ -90,7 +93,8 @@
         Settings.Global.putString(resolver, NETWORK_AVOID_BAD_WIFI, "1")
         ConnectivityResources.setResourcesContextForTest(it)
     }
-    private val tracker = MultinetworkPolicyTracker(context, null /* handler */)
+    private val handler = mock(Handler::class.java)
+    private val tracker = MultinetworkPolicyTracker(context, handler)
 
     private fun assertMultipathPreference(preference: Int) {
         Settings.Global.putString(resolver, NETWORK_METERED_MULTIPATH_PREFERENCE,
@@ -99,6 +103,11 @@
         assertEquals(preference, tracker.meteredMultipathPreference)
     }
 
+    @Before
+    fun setUp() {
+        tracker.start()
+    }
+
     @After
     fun tearDown() {
         ConnectivityResources.setResourcesContextForTest(null)
diff --git a/tests/unit/java/com/android/server/BpfNetMapsTest.java b/tests/unit/java/com/android/server/BpfNetMapsTest.java
index eb5d2ef..4966aed 100644
--- a/tests/unit/java/com/android/server/BpfNetMapsTest.java
+++ b/tests/unit/java/com/android/server/BpfNetMapsTest.java
@@ -66,6 +66,7 @@
 
 import com.android.modules.utils.build.SdkLevel;
 import com.android.net.module.util.IBpfMap;
+import com.android.net.module.util.Struct.S32;
 import com.android.net.module.util.Struct.U32;
 import com.android.net.module.util.Struct.U8;
 import com.android.net.module.util.bpf.CookieTagMapKey;
@@ -102,8 +103,8 @@
     private static final int NO_IIF = 0;
     private static final int NULL_IIF = 0;
     private static final String CHAINNAME = "fw_dozable";
-    private static final U32 UID_RULES_CONFIGURATION_KEY = new U32(0);
-    private static final U32 CURRENT_STATS_MAP_CONFIGURATION_KEY = new U32(1);
+    private static final S32 UID_RULES_CONFIGURATION_KEY = new S32(0);
+    private static final S32 CURRENT_STATS_MAP_CONFIGURATION_KEY = new S32(1);
     private static final List<Integer> FIREWALL_CHAINS = List.of(
             FIREWALL_CHAIN_DOZABLE,
             FIREWALL_CHAIN_STANDBY,
@@ -123,10 +124,10 @@
     @Mock INetd mNetd;
     @Mock BpfNetMaps.Dependencies mDeps;
     @Mock Context mContext;
-    private final IBpfMap<U32, U32> mConfigurationMap = new TestBpfMap<>(U32.class, U32.class);
-    private final IBpfMap<U32, UidOwnerValue> mUidOwnerMap =
-            new TestBpfMap<>(U32.class, UidOwnerValue.class);
-    private final IBpfMap<U32, U8> mUidPermissionMap = new TestBpfMap<>(U32.class, U8.class);
+    private final IBpfMap<S32, U32> mConfigurationMap = new TestBpfMap<>(S32.class, U32.class);
+    private final IBpfMap<S32, UidOwnerValue> mUidOwnerMap =
+            new TestBpfMap<>(S32.class, UidOwnerValue.class);
+    private final IBpfMap<S32, U8> mUidPermissionMap = new TestBpfMap<>(S32.class, U8.class);
     private final IBpfMap<CookieTagMapKey, CookieTagMapValue> mCookieTagMap =
             spy(new TestBpfMap<>(CookieTagMapKey.class, CookieTagMapValue.class));
 
@@ -292,9 +293,9 @@
                 () -> mBpfNetMaps.setChildChain(FIREWALL_CHAIN_DOZABLE, true /* enable */));
     }
 
-    private void checkUidOwnerValue(final long uid, final long expectedIif,
+    private void checkUidOwnerValue(final int uid, final int expectedIif,
             final long expectedMatch) throws Exception {
-        final UidOwnerValue config = mUidOwnerMap.getValue(new U32(uid));
+        final UidOwnerValue config = mUidOwnerMap.getValue(new S32(uid));
         if (expectedMatch == 0) {
             assertNull(config);
         } else {
@@ -303,8 +304,8 @@
         }
     }
 
-    private void doTestRemoveNaughtyApp(final long iif, final long match) throws Exception {
-        mUidOwnerMap.updateEntry(new U32(TEST_UID), new UidOwnerValue(iif, match));
+    private void doTestRemoveNaughtyApp(final int iif, final long match) throws Exception {
+        mUidOwnerMap.updateEntry(new S32(TEST_UID), new UidOwnerValue(iif, match));
 
         mBpfNetMaps.removeNaughtyApp(TEST_UID);
 
@@ -341,9 +342,9 @@
                 () -> mBpfNetMaps.removeNaughtyApp(TEST_UID));
     }
 
-    private void doTestAddNaughtyApp(final long iif, final long match) throws Exception {
+    private void doTestAddNaughtyApp(final int iif, final long match) throws Exception {
         if (match != NO_MATCH) {
-            mUidOwnerMap.updateEntry(new U32(TEST_UID), new UidOwnerValue(iif, match));
+            mUidOwnerMap.updateEntry(new S32(TEST_UID), new UidOwnerValue(iif, match));
         }
 
         mBpfNetMaps.addNaughtyApp(TEST_UID);
@@ -373,8 +374,8 @@
                 () -> mBpfNetMaps.addNaughtyApp(TEST_UID));
     }
 
-    private void doTestRemoveNiceApp(final long iif, final long match) throws Exception {
-        mUidOwnerMap.updateEntry(new U32(TEST_UID), new UidOwnerValue(iif, match));
+    private void doTestRemoveNiceApp(final int iif, final long match) throws Exception {
+        mUidOwnerMap.updateEntry(new S32(TEST_UID), new UidOwnerValue(iif, match));
 
         mBpfNetMaps.removeNiceApp(TEST_UID);
 
@@ -411,9 +412,9 @@
                 () -> mBpfNetMaps.removeNiceApp(TEST_UID));
     }
 
-    private void doTestAddNiceApp(final long iif, final long match) throws Exception {
+    private void doTestAddNiceApp(final int iif, final long match) throws Exception {
         if (match != NO_MATCH) {
-            mUidOwnerMap.updateEntry(new U32(TEST_UID), new UidOwnerValue(iif, match));
+            mUidOwnerMap.updateEntry(new S32(TEST_UID), new UidOwnerValue(iif, match));
         }
 
         mBpfNetMaps.addNiceApp(TEST_UID);
@@ -443,10 +444,10 @@
                 () -> mBpfNetMaps.addNiceApp(TEST_UID));
     }
 
-    private void doTestUpdateUidLockdownRule(final long iif, final long match, final boolean add)
+    private void doTestUpdateUidLockdownRule(final int iif, final long match, final boolean add)
             throws Exception {
         if (match != NO_MATCH) {
-            mUidOwnerMap.updateEntry(new U32(TEST_UID), new UidOwnerValue(iif, match));
+            mUidOwnerMap.updateEntry(new S32(TEST_UID), new UidOwnerValue(iif, match));
         }
 
         mBpfNetMaps.updateUidLockdownRule(TEST_UID, add);
@@ -516,8 +517,8 @@
         final int uid1 = TEST_UIDS[1];
         final long match0 = DOZABLE_MATCH;
         final long match1 = DOZABLE_MATCH | POWERSAVE_MATCH | RESTRICTED_MATCH;
-        mUidOwnerMap.updateEntry(new U32(uid0), new UidOwnerValue(NO_IIF, match0));
-        mUidOwnerMap.updateEntry(new U32(uid1), new UidOwnerValue(NO_IIF, match1));
+        mUidOwnerMap.updateEntry(new S32(uid0), new UidOwnerValue(NO_IIF, match0));
+        mUidOwnerMap.updateEntry(new S32(uid1), new UidOwnerValue(NO_IIF, match1));
 
         mBpfNetMaps.addUidInterfaceRules(TEST_IF_NAME, TEST_UIDS);
 
@@ -532,8 +533,8 @@
         final int uid1 = TEST_UIDS[1];
         final long match0 = IIF_MATCH;
         final long match1 = IIF_MATCH | DOZABLE_MATCH | POWERSAVE_MATCH | RESTRICTED_MATCH;
-        mUidOwnerMap.updateEntry(new U32(uid0), new UidOwnerValue(TEST_IF_INDEX + 1, match0));
-        mUidOwnerMap.updateEntry(new U32(uid1), new UidOwnerValue(NULL_IIF, match1));
+        mUidOwnerMap.updateEntry(new S32(uid0), new UidOwnerValue(TEST_IF_INDEX + 1, match0));
+        mUidOwnerMap.updateEntry(new S32(uid1), new UidOwnerValue(NULL_IIF, match1));
 
         mBpfNetMaps.addUidInterfaceRules(TEST_IF_NAME, TEST_UIDS);
 
@@ -556,8 +557,8 @@
         final int uid1 = TEST_UIDS[1];
         final long match0 = IIF_MATCH;
         final long match1 = IIF_MATCH | DOZABLE_MATCH | POWERSAVE_MATCH | RESTRICTED_MATCH;
-        mUidOwnerMap.updateEntry(new U32(uid0), new UidOwnerValue(TEST_IF_INDEX, match0));
-        mUidOwnerMap.updateEntry(new U32(uid1), new UidOwnerValue(NULL_IIF, match1));
+        mUidOwnerMap.updateEntry(new S32(uid0), new UidOwnerValue(TEST_IF_INDEX, match0));
+        mUidOwnerMap.updateEntry(new S32(uid1), new UidOwnerValue(NULL_IIF, match1));
 
         mBpfNetMaps.addUidInterfaceRules(null /* ifName */, TEST_UIDS);
 
@@ -565,12 +566,12 @@
         checkUidOwnerValue(uid1, NULL_IIF, match1);
     }
 
-    private void doTestRemoveUidInterfaceRules(final long iif0, final long match0,
-            final long iif1, final long match1) throws Exception {
+    private void doTestRemoveUidInterfaceRules(final int iif0, final long match0,
+            final int iif1, final long match1) throws Exception {
         final int uid0 = TEST_UIDS[0];
         final int uid1 = TEST_UIDS[1];
-        mUidOwnerMap.updateEntry(new U32(uid0), new UidOwnerValue(iif0, match0));
-        mUidOwnerMap.updateEntry(new U32(uid1), new UidOwnerValue(iif1, match1));
+        mUidOwnerMap.updateEntry(new S32(uid0), new UidOwnerValue(iif0, match0));
+        mUidOwnerMap.updateEntry(new S32(uid1), new UidOwnerValue(iif1, match1));
 
         mBpfNetMaps.removeUidInterfaceRules(TEST_UIDS);
 
@@ -593,7 +594,7 @@
     }
 
     private void doTestSetUidRule(final List<Integer> testChains) throws Exception {
-        mUidOwnerMap.updateEntry(new U32(TEST_UID), new UidOwnerValue(TEST_IF_INDEX, IIF_MATCH));
+        mUidOwnerMap.updateEntry(new S32(TEST_UID), new UidOwnerValue(TEST_IF_INDEX, IIF_MATCH));
 
         for (final int chain: testChains) {
             final int ruleToAddMatch = mBpfNetMaps.isFirewallAllowList(chain)
@@ -697,8 +698,8 @@
         final int uid1 = TEST_UIDS[1];
         final long match0 = POWERSAVE_MATCH;
         final long match1 = POWERSAVE_MATCH | RESTRICTED_MATCH;
-        mUidOwnerMap.updateEntry(new U32(uid0), new UidOwnerValue(NO_IIF, match0));
-        mUidOwnerMap.updateEntry(new U32(uid1), new UidOwnerValue(NO_IIF, match1));
+        mUidOwnerMap.updateEntry(new S32(uid0), new UidOwnerValue(NO_IIF, match0));
+        mUidOwnerMap.updateEntry(new S32(uid1), new UidOwnerValue(NO_IIF, match1));
 
         mBpfNetMaps.replaceUidChain(FIREWALL_CHAIN_DOZABLE, new int[]{uid1});
 
@@ -713,8 +714,8 @@
         final int uid1 = TEST_UIDS[1];
         final long match0 = IIF_MATCH;
         final long match1 = IIF_MATCH | POWERSAVE_MATCH | RESTRICTED_MATCH;
-        mUidOwnerMap.updateEntry(new U32(uid0), new UidOwnerValue(TEST_IF_INDEX, match0));
-        mUidOwnerMap.updateEntry(new U32(uid1), new UidOwnerValue(NULL_IIF, match1));
+        mUidOwnerMap.updateEntry(new S32(uid0), new UidOwnerValue(TEST_IF_INDEX, match0));
+        mUidOwnerMap.updateEntry(new S32(uid1), new UidOwnerValue(NULL_IIF, match1));
 
         mBpfNetMaps.replaceUidChain(FIREWALL_CHAIN_DOZABLE, TEST_UIDS);
 
@@ -729,8 +730,8 @@
         final int uid1 = TEST_UIDS[1];
         final long match0 = IIF_MATCH | DOZABLE_MATCH;
         final long match1 = IIF_MATCH | POWERSAVE_MATCH | RESTRICTED_MATCH;
-        mUidOwnerMap.updateEntry(new U32(uid0), new UidOwnerValue(TEST_IF_INDEX, match0));
-        mUidOwnerMap.updateEntry(new U32(uid1), new UidOwnerValue(NULL_IIF, match1));
+        mUidOwnerMap.updateEntry(new S32(uid0), new UidOwnerValue(TEST_IF_INDEX, match0));
+        mUidOwnerMap.updateEntry(new S32(uid1), new UidOwnerValue(NULL_IIF, match1));
 
         mBpfNetMaps.replaceUidChain(FIREWALL_CHAIN_DOZABLE, new int[]{uid1});
 
@@ -768,8 +769,8 @@
 
         final int uid0 = TEST_UIDS[0];
         final int uid1 = TEST_UIDS[1];
-        assertEquals(PERMISSION_UPDATE_DEVICE_STATS, mUidPermissionMap.getValue(new U32(uid0)).val);
-        assertEquals(PERMISSION_UPDATE_DEVICE_STATS, mUidPermissionMap.getValue(new U32(uid1)).val);
+        assertEquals(PERMISSION_UPDATE_DEVICE_STATS, mUidPermissionMap.getValue(new S32(uid0)).val);
+        assertEquals(PERMISSION_UPDATE_DEVICE_STATS, mUidPermissionMap.getValue(new S32(uid1)).val);
     }
 
     @Test
@@ -780,8 +781,8 @@
 
         final int uid0 = TEST_UIDS[0];
         final int uid1 = TEST_UIDS[1];
-        assertEquals(permission, mUidPermissionMap.getValue(new U32(uid0)).val);
-        assertEquals(permission, mUidPermissionMap.getValue(new U32(uid1)).val);
+        assertEquals(permission, mUidPermissionMap.getValue(new S32(uid0)).val);
+        assertEquals(permission, mUidPermissionMap.getValue(new S32(uid1)).val);
     }
 
     @Test
@@ -792,8 +793,8 @@
         mBpfNetMaps.setNetPermForUids(PERMISSION_INTERNET, TEST_UIDS);
         mBpfNetMaps.setNetPermForUids(PERMISSION_NONE, new int[]{uid0});
 
-        assertEquals(PERMISSION_NONE, mUidPermissionMap.getValue(new U32(uid0)).val);
-        assertNull(mUidPermissionMap.getValue(new U32(uid1)));
+        assertEquals(PERMISSION_NONE, mUidPermissionMap.getValue(new S32(uid0)).val);
+        assertNull(mUidPermissionMap.getValue(new S32(uid1)));
     }
 
     @Test
@@ -804,8 +805,8 @@
         mBpfNetMaps.setNetPermForUids(PERMISSION_UPDATE_DEVICE_STATS, TEST_UIDS);
         mBpfNetMaps.setNetPermForUids(PERMISSION_NONE, new int[]{uid0});
 
-        assertEquals(PERMISSION_NONE, mUidPermissionMap.getValue(new U32(uid0)).val);
-        assertEquals(PERMISSION_UPDATE_DEVICE_STATS, mUidPermissionMap.getValue(new U32(uid1)).val);
+        assertEquals(PERMISSION_NONE, mUidPermissionMap.getValue(new S32(uid0)).val);
+        assertEquals(PERMISSION_UPDATE_DEVICE_STATS, mUidPermissionMap.getValue(new S32(uid1)).val);
     }
 
     @Test
@@ -817,8 +818,8 @@
         mBpfNetMaps.setNetPermForUids(permission, TEST_UIDS);
         mBpfNetMaps.setNetPermForUids(PERMISSION_NONE, new int[]{uid0});
 
-        assertEquals(PERMISSION_NONE, mUidPermissionMap.getValue(new U32(uid0)).val);
-        assertEquals(permission, mUidPermissionMap.getValue(new U32(uid1)).val);
+        assertEquals(PERMISSION_NONE, mUidPermissionMap.getValue(new S32(uid0)).val);
+        assertEquals(permission, mUidPermissionMap.getValue(new S32(uid1)).val);
     }
 
     @Test
@@ -830,8 +831,8 @@
         mBpfNetMaps.setNetPermForUids(permission, TEST_UIDS);
         mBpfNetMaps.setNetPermForUids(PERMISSION_UNINSTALLED, new int[]{uid0});
 
-        assertNull(mUidPermissionMap.getValue(new U32(uid0)));
-        assertEquals(permission, mUidPermissionMap.getValue(new U32(uid1)).val);
+        assertNull(mUidPermissionMap.getValue(new S32(uid0)));
+        assertEquals(permission, mUidPermissionMap.getValue(new S32(uid1)).val);
     }
 
     @Test
@@ -842,28 +843,28 @@
         final int permission = PERMISSION_INTERNET | PERMISSION_UPDATE_DEVICE_STATS;
 
         mBpfNetMaps.setNetPermForUids(permission, TEST_UIDS);
-        assertEquals(permission, mUidPermissionMap.getValue(new U32(uid0)).val);
-        assertEquals(permission, mUidPermissionMap.getValue(new U32(uid1)).val);
+        assertEquals(permission, mUidPermissionMap.getValue(new S32(uid0)).val);
+        assertEquals(permission, mUidPermissionMap.getValue(new S32(uid1)).val);
 
         mBpfNetMaps.setNetPermForUids(permission, TEST_UIDS);
-        assertEquals(permission, mUidPermissionMap.getValue(new U32(uid0)).val);
-        assertEquals(permission, mUidPermissionMap.getValue(new U32(uid1)).val);
+        assertEquals(permission, mUidPermissionMap.getValue(new S32(uid0)).val);
+        assertEquals(permission, mUidPermissionMap.getValue(new S32(uid1)).val);
 
         mBpfNetMaps.setNetPermForUids(PERMISSION_NONE, TEST_UIDS);
-        assertEquals(PERMISSION_NONE, mUidPermissionMap.getValue(new U32(uid0)).val);
-        assertEquals(PERMISSION_NONE, mUidPermissionMap.getValue(new U32(uid1)).val);
+        assertEquals(PERMISSION_NONE, mUidPermissionMap.getValue(new S32(uid0)).val);
+        assertEquals(PERMISSION_NONE, mUidPermissionMap.getValue(new S32(uid1)).val);
 
         mBpfNetMaps.setNetPermForUids(PERMISSION_NONE, TEST_UIDS);
-        assertEquals(PERMISSION_NONE, mUidPermissionMap.getValue(new U32(uid0)).val);
-        assertEquals(PERMISSION_NONE, mUidPermissionMap.getValue(new U32(uid1)).val);
+        assertEquals(PERMISSION_NONE, mUidPermissionMap.getValue(new S32(uid0)).val);
+        assertEquals(PERMISSION_NONE, mUidPermissionMap.getValue(new S32(uid1)).val);
 
         mBpfNetMaps.setNetPermForUids(PERMISSION_UNINSTALLED, TEST_UIDS);
-        assertNull(mUidPermissionMap.getValue(new U32(uid0)));
-        assertNull(mUidPermissionMap.getValue(new U32(uid1)));
+        assertNull(mUidPermissionMap.getValue(new S32(uid0)));
+        assertNull(mUidPermissionMap.getValue(new S32(uid1)));
 
         mBpfNetMaps.setNetPermForUids(PERMISSION_UNINSTALLED, TEST_UIDS);
-        assertNull(mUidPermissionMap.getValue(new U32(uid0)));
-        assertNull(mUidPermissionMap.getValue(new U32(uid1)));
+        assertNull(mUidPermissionMap.getValue(new S32(uid0)));
+        assertNull(mUidPermissionMap.getValue(new S32(uid1)));
     }
 
     @Test
@@ -898,13 +899,13 @@
         mCookieTagMap.updateEntry(new CookieTagMapKey(0), new CookieTagMapValue(0, 0));
 
         // mUidOwnerMap has 2 entries
-        mUidOwnerMap.updateEntry(new U32(0), new UidOwnerValue(0, 0));
-        mUidOwnerMap.updateEntry(new U32(1), new UidOwnerValue(0, 0));
+        mUidOwnerMap.updateEntry(new S32(0), new UidOwnerValue(0, 0));
+        mUidOwnerMap.updateEntry(new S32(1), new UidOwnerValue(0, 0));
 
         // mUidPermissionMap has 3 entries
-        mUidPermissionMap.updateEntry(new U32(0), new U8((short) 0));
-        mUidPermissionMap.updateEntry(new U32(1), new U8((short) 0));
-        mUidPermissionMap.updateEntry(new U32(2), new U8((short) 0));
+        mUidPermissionMap.updateEntry(new S32(0), new U8((short) 0));
+        mUidPermissionMap.updateEntry(new S32(1), new U8((short) 0));
+        mUidPermissionMap.updateEntry(new S32(2), new U8((short) 0));
 
         final int ret = mBpfNetMaps.pullBpfMapInfoAtom(NETWORK_BPF_MAP_INFO, new ArrayList<>());
         assertEquals(StatsManager.PULL_SUCCESS, ret);
diff --git a/tests/unit/java/com/android/server/ConnectivityServiceTest.java b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
index 5aade99..d2a7135 100755
--- a/tests/unit/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
@@ -3539,7 +3539,7 @@
      **/
     private int expectUnvalidationCheckWillNotify(TestNetworkAgentWrapper agent,
             NotificationType type) {
-        mService.scheduleUnvalidatedPrompt(agent.getNetwork(), 0 /* delayMs */);
+        mService.scheduleEvaluationTimeout(agent.getNetwork(), 0 /* delayMs */);
         waitForIdle();
         return expectNotification(agent, type);
     }
@@ -3561,7 +3561,7 @@
      * @return the notification ID.
      **/
     private void expectUnvalidationCheckWillNotNotify(TestNetworkAgentWrapper agent) {
-        mService.scheduleUnvalidatedPrompt(agent.getNetwork(), 0 /*delayMs */);
+        mService.scheduleEvaluationTimeout(agent.getNetwork(), 0 /*delayMs */);
         waitForIdle();
         verify(mNotificationManager, never()).notifyAsUser(anyString(), anyInt(), any(), any());
     }
@@ -3784,6 +3784,63 @@
         callback.expectCallback(CallbackEntry.LOST, mCellNetworkAgent);
     }
 
+    private void doTestFirstEvaluation(
+            @NonNull final Consumer<TestNetworkAgentWrapper> doConnect,
+            final boolean waitForSecondCaps,
+            final boolean evaluatedByValidation)
+            throws Exception {
+        final NetworkRequest request = new NetworkRequest.Builder()
+                .addTransportType(TRANSPORT_WIFI)
+                .build();
+        TestNetworkCallback callback = new TestNetworkCallback();
+        mCm.registerNetworkCallback(request, callback);
+
+        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
+        doConnect.accept(mWiFiNetworkAgent);
+        // Expect the available callbacks, but don't require specific values for their arguments
+        // since this method doesn't know how the network was connected.
+        callback.expectCallback(CallbackEntry.AVAILABLE, mWiFiNetworkAgent);
+        callback.expectCallback(CallbackEntry.NETWORK_CAPS_UPDATED, mWiFiNetworkAgent);
+        callback.expectCallback(CallbackEntry.LINK_PROPERTIES_CHANGED, mWiFiNetworkAgent);
+        callback.expectCallback(CallbackEntry.BLOCKED_STATUS, mWiFiNetworkAgent);
+        if (waitForSecondCaps) {
+            // This is necessary because of b/245893397, the same bug that happens where we use
+            // expectAvailableDoubleValidatedCallbacks.
+            callback.expectCallback(CallbackEntry.NETWORK_CAPS_UPDATED, mWiFiNetworkAgent);
+        }
+        final NetworkAgentInfo nai =
+                mService.getNetworkAgentInfoForNetwork(mWiFiNetworkAgent.getNetwork());
+        final long firstEvaluation = nai.getFirstEvaluationConcludedTime();
+        if (evaluatedByValidation) {
+            assertNotEquals(0L, firstEvaluation);
+        } else {
+            assertEquals(0L, firstEvaluation);
+        }
+        mService.scheduleEvaluationTimeout(mWiFiNetworkAgent.getNetwork(), 0L /* timeout */);
+        waitForIdle();
+        if (evaluatedByValidation) {
+            assertEquals(firstEvaluation, nai.getFirstEvaluationConcludedTime());
+        } else {
+            assertNotEquals(0L, nai.getFirstEvaluationConcludedTime());
+        }
+        mWiFiNetworkAgent.disconnect();
+        callback.expectCallback(CallbackEntry.LOST, mWiFiNetworkAgent);
+
+        mCm.unregisterNetworkCallback(callback);
+    }
+
+    @Test
+    public void testEverEvaluated() throws Exception {
+        doTestFirstEvaluation(naw -> naw.connect(true /* validated */),
+                true /* waitForSecondCaps */, true /* immediatelyEvaluated */);
+        doTestFirstEvaluation(naw -> naw.connectWithPartialConnectivity(),
+                true /* waitForSecondCaps */, true /* immediatelyEvaluated */);
+        doTestFirstEvaluation(naw -> naw.connectWithCaptivePortal(TEST_REDIRECT_URL, false),
+                true /* waitForSecondCaps */, true /* immediatelyEvaluated */);
+        doTestFirstEvaluation(naw -> naw.connect(false /* validated */),
+                false /* waitForSecondCaps */, false /* immediatelyEvaluated */);
+    }
+
     private void tryNetworkFactoryRequests(int capability) throws Exception {
         // Verify NOT_RESTRICTED is set appropriately
         final NetworkCapabilities nc = new NetworkRequest.Builder().addCapability(capability)
@@ -16570,19 +16627,21 @@
         assertThrows(NullPointerException.class, () -> mService.unofferNetwork(null));
     }
 
-    @Test
-    public void testIgnoreValidationAfterRoamDisabled() throws Exception {
+    public void doTestIgnoreValidationAfterRoam(final boolean enabled) throws Exception {
         assumeFalse(SdkLevel.isAtLeastT());
-        // testIgnoreValidationAfterRoam off
-        doReturn(-1).when(mResources)
+        doReturn(enabled ? 5000 : -1).when(mResources)
                 .getInteger(R.integer.config_validationFailureAfterRoamIgnoreTimeMillis);
 
         mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
         mCellNetworkAgent.connect(true);
         NetworkCapabilities wifiNc1 = new NetworkCapabilities()
+                .addCapability(NET_CAPABILITY_INTERNET)
+                .addCapability(NET_CAPABILITY_NOT_VCN_MANAGED)
                 .addTransportType(TRANSPORT_WIFI)
                 .setTransportInfo(new WifiInfo.Builder().setBssid("AA:AA:AA:AA:AA:AA").build());
         NetworkCapabilities wifiNc2 = new NetworkCapabilities()
+                .addCapability(NET_CAPABILITY_INTERNET)
+                .addCapability(NET_CAPABILITY_NOT_VCN_MANAGED)
                 .addTransportType(TRANSPORT_WIFI)
                 .setTransportInfo(new WifiInfo.Builder().setBssid("BB:BB:BB:BB:BB:BB").build());
         final LinkProperties wifiLp = new LinkProperties();
@@ -16594,51 +16653,74 @@
         final TestNetworkCallback wifiNetworkCallback = new TestNetworkCallback();
         final NetworkRequest wifiRequest = new NetworkRequest.Builder()
                 .addTransportType(TRANSPORT_WIFI).build();
-        mCm.registerNetworkCallback(wifiRequest, wifiNetworkCallback);
+        mCm.requestNetwork(wifiRequest, wifiNetworkCallback);
         wifiNetworkCallback.expectAvailableCallbacksValidated(mWiFiNetworkAgent);
         registerDefaultNetworkCallbacks();
         mDefaultNetworkCallback.expectAvailableCallbacksValidated(mWiFiNetworkAgent);
 
-        // Wi-Fi roaming from wifiNc1 to wifiNc2.
+        // There is a bug in the current code where ignoring validation after roam will not
+        // correctly change the default network if the result if the validation is partial or
+        // captive portal. TODO : fix the bug and reinstate this code.
+        if (false) {
+            // Wi-Fi roaming from wifiNc1 to wifiNc2 but the network is now behind a captive portal.
+            mWiFiNetworkAgent.setNetworkCapabilities(wifiNc2, true /* sendToConnectivityService */);
+            // The only thing changed in this CAPS is the BSSID, which can't be tested for in this
+            // test because it's redacted.
+            wifiNetworkCallback.expectCallback(CallbackEntry.NETWORK_CAPS_UPDATED,
+                    mWiFiNetworkAgent);
+            mDefaultNetworkCallback.expectCallback(CallbackEntry.NETWORK_CAPS_UPDATED,
+                    mWiFiNetworkAgent);
+            mWiFiNetworkAgent.setNetworkPortal(TEST_REDIRECT_URL, false /* isStrictMode */);
+            mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), false);
+            // Wi-Fi is now detected to have a portal : cell should become the default network.
+            mDefaultNetworkCallback.expectAvailableCallbacksValidated(mCellNetworkAgent);
+            wifiNetworkCallback.expectCapabilitiesWithout(NET_CAPABILITY_VALIDATED,
+                    mWiFiNetworkAgent);
+            wifiNetworkCallback.expectCapabilitiesWith(NET_CAPABILITY_CAPTIVE_PORTAL,
+                    mWiFiNetworkAgent);
+
+            // Wi-Fi becomes valid again. The default network goes back to Wi-Fi.
+            mWiFiNetworkAgent.setNetworkValid(false /* isStrictMode */);
+            mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), true);
+            mDefaultNetworkCallback.expectAvailableCallbacksValidated(mWiFiNetworkAgent);
+            wifiNetworkCallback.expectCapabilitiesWithout(NET_CAPABILITY_CAPTIVE_PORTAL,
+                    mWiFiNetworkAgent);
+
+            // Wi-Fi roaming from wifiNc2 to wifiNc1, and the network now has partial connectivity.
+            mWiFiNetworkAgent.setNetworkCapabilities(wifiNc1, true);
+            wifiNetworkCallback.expectCallback(CallbackEntry.NETWORK_CAPS_UPDATED,
+                    mWiFiNetworkAgent);
+            mDefaultNetworkCallback.expectCallback(CallbackEntry.NETWORK_CAPS_UPDATED,
+                    mWiFiNetworkAgent);
+            mWiFiNetworkAgent.setNetworkPartial();
+            mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), false);
+            // Wi-Fi now only offers partial connectivity, so in the absence of accepting partial
+            // connectivity explicitly for this network, it loses default status to cell.
+            mDefaultNetworkCallback.expectAvailableCallbacksValidated(mCellNetworkAgent);
+            wifiNetworkCallback.expectCapabilitiesWith(NET_CAPABILITY_PARTIAL_CONNECTIVITY,
+                    mWiFiNetworkAgent);
+
+            // Wi-Fi becomes valid again. The default network goes back to Wi-Fi.
+            mWiFiNetworkAgent.setNetworkValid(false /* isStrictMode */);
+            mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), true);
+            mDefaultNetworkCallback.expectAvailableCallbacksValidated(mWiFiNetworkAgent);
+            wifiNetworkCallback.expectCapabilitiesWithout(NET_CAPABILITY_PARTIAL_CONNECTIVITY,
+                    mWiFiNetworkAgent);
+        }
+
+        // Wi-Fi roams from wifiNc1 to wifiNc2, and now becomes really invalid. If validation
+        // failures after roam are not ignored, this will cause cell to become the default network.
+        // If they are ignored, this will not cause a switch until later.
         mWiFiNetworkAgent.setNetworkCapabilities(wifiNc2, true);
-        mWiFiNetworkAgent.setNetworkInvalid(false);
+        mDefaultNetworkCallback.expectCallback(CallbackEntry.NETWORK_CAPS_UPDATED,
+                mWiFiNetworkAgent);
+        mWiFiNetworkAgent.setNetworkInvalid(false /* isStrictMode */);
         mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), false);
-        mDefaultNetworkCallback.expectAvailableCallbacksValidated(mCellNetworkAgent);
-    }
 
-    @Test
-    public void testIgnoreValidationAfterRoamEnabled() throws Exception {
-        assumeFalse(SdkLevel.isAtLeastT());
-        // testIgnoreValidationAfterRoam on
-        doReturn(5000).when(mResources)
-                .getInteger(R.integer.config_validationFailureAfterRoamIgnoreTimeMillis);
-
-        mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
-        mCellNetworkAgent.connect(true);
-        NetworkCapabilities wifiNc1 = new NetworkCapabilities()
-                .addTransportType(TRANSPORT_WIFI)
-                .setTransportInfo(new WifiInfo.Builder().setBssid("AA:AA:AA:AA:AA:AA").build());
-        NetworkCapabilities wifiNc2 = new NetworkCapabilities()
-                .addTransportType(TRANSPORT_WIFI)
-                .setTransportInfo(new WifiInfo.Builder().setBssid("BB:BB:BB:BB:BB:BB").build());
-        final LinkProperties wifiLp = new LinkProperties();
-        wifiLp.setInterfaceName(WIFI_IFNAME);
-        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI, wifiLp, wifiNc1);
-        mWiFiNetworkAgent.connect(true);
-
-        // The default network will be switching to Wi-Fi Network.
-        final TestNetworkCallback wifiNetworkCallback = new TestNetworkCallback();
-        final NetworkRequest wifiRequest = new NetworkRequest.Builder()
-                .addTransportType(TRANSPORT_WIFI).build();
-        mCm.registerNetworkCallback(wifiRequest, wifiNetworkCallback);
-        wifiNetworkCallback.expectAvailableCallbacksValidated(mWiFiNetworkAgent);
-        registerDefaultNetworkCallbacks();
-        mDefaultNetworkCallback.expectAvailableCallbacksValidated(mWiFiNetworkAgent);
-
-        // Wi-Fi roaming from wifiNc1 to wifiNc2.
-        mWiFiNetworkAgent.setNetworkCapabilities(wifiNc2, true);
-        mWiFiNetworkAgent.setNetworkInvalid(false);
-        mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), false);
+        if (!enabled) {
+            mDefaultNetworkCallback.expectAvailableCallbacksValidated(mCellNetworkAgent);
+            return;
+        }
 
         // Network validation failed, but the result will be ignored.
         assertTrue(mCm.getNetworkCapabilities(mWiFiNetworkAgent.getNetwork()).hasCapability(
@@ -16655,6 +16737,17 @@
         waitForValidationBlock.block(150);
         mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), false);
         mDefaultNetworkCallback.expectAvailableCallbacksValidated(mCellNetworkAgent);
+
+        mCm.unregisterNetworkCallback(wifiNetworkCallback);
+    }
+
+    @Test
+    public void testIgnoreValidationAfterRoamDisabled() throws Exception {
+        doTestIgnoreValidationAfterRoam(false /* enabled */);
+    }
+    @Test
+    public void testIgnoreValidationAfterRoamEnabled() throws Exception {
+        doTestIgnoreValidationAfterRoam(true /* enabled */);
     }
 
     @Test
diff --git a/tests/unit/java/com/android/server/connectivity/VpnTest.java b/tests/unit/java/com/android/server/connectivity/VpnTest.java
index 795eb47..06dabb0 100644
--- a/tests/unit/java/com/android/server/connectivity/VpnTest.java
+++ b/tests/unit/java/com/android/server/connectivity/VpnTest.java
@@ -944,12 +944,15 @@
     @Test
     public void testSetAndGetAppExclusionListRestrictedUser() throws Exception {
         final Vpn vpn = prepareVpnForVerifyAppExclusionList();
+
         // Mock it to restricted profile
         when(mUserManager.getUserInfo(anyInt())).thenReturn(RESTRICTED_PROFILE_A);
+
         // Restricted users cannot configure VPNs
         assertThrows(SecurityException.class,
                 () -> vpn.setAppExclusionList(TEST_VPN_PKG, new ArrayList<>()));
-        assertThrows(SecurityException.class, () -> vpn.getAppExclusionList(TEST_VPN_PKG));
+
+        assertEquals(Arrays.asList(PKGS), vpn.getAppExclusionList(TEST_VPN_PKG));
     }
 
     @Test
@@ -1882,26 +1885,7 @@
         vpnSnapShot.vpn.mVpnRunner.exitVpnRunner();
     }
 
-    private void verifyHandlingNetworkLoss() throws Exception {
-        final ArgumentCaptor<LinkProperties> lpCaptor =
-                ArgumentCaptor.forClass(LinkProperties.class);
-        verify(mMockNetworkAgent).doSendLinkProperties(lpCaptor.capture());
-        final LinkProperties lp = lpCaptor.getValue();
-
-        assertNull(lp.getInterfaceName());
-        final List<RouteInfo> expectedRoutes = Arrays.asList(
-                new RouteInfo(new IpPrefix(Inet4Address.ANY, 0), null /*gateway*/,
-                        null /*iface*/, RTN_UNREACHABLE),
-                new RouteInfo(new IpPrefix(Inet6Address.ANY, 0), null /*gateway*/,
-                        null /*iface*/, RTN_UNREACHABLE));
-        assertEquals(expectedRoutes, lp.getRoutes());
-    }
-
-    @Test
-    public void testStartPlatformVpnHandlesNetworkLoss_mobikeEnabled() throws Exception {
-        final PlatformVpnSnapshot vpnSnapShot = verifySetupPlatformVpn(
-                createIkeConfig(createIkeConnectInfo(), false /* isMobikeEnabled */));
-
+    private void verifyHandlingNetworkLoss(PlatformVpnSnapshot vpnSnapShot) throws Exception {
         // Forget the #sendLinkProperties during first setup.
         reset(mMockNetworkAgent);
 
@@ -1915,21 +1899,34 @@
         verify(mExecutor).schedule(runnableCaptor.capture(), anyLong(), any());
         runnableCaptor.getValue().run();
 
-        verifyHandlingNetworkLoss();
+        final ArgumentCaptor<LinkProperties> lpCaptor =
+                ArgumentCaptor.forClass(LinkProperties.class);
+        verify(mMockNetworkAgent).doSendLinkProperties(lpCaptor.capture());
+        final LinkProperties lp = lpCaptor.getValue();
+
+        assertNull(lp.getInterfaceName());
+        final List<RouteInfo> expectedRoutes = Arrays.asList(
+                new RouteInfo(new IpPrefix(Inet4Address.ANY, 0), null /* gateway */,
+                        null /* iface */, RTN_UNREACHABLE),
+                new RouteInfo(new IpPrefix(Inet6Address.ANY, 0), null /* gateway */,
+                        null /* iface */, RTN_UNREACHABLE));
+        assertEquals(expectedRoutes, lp.getRoutes());
+
+        verify(mMockNetworkAgent).unregister();
+    }
+
+    @Test
+    public void testStartPlatformVpnHandlesNetworkLoss_mobikeEnabled() throws Exception {
+        final PlatformVpnSnapshot vpnSnapShot = verifySetupPlatformVpn(
+                createIkeConfig(createIkeConnectInfo(), true /* isMobikeEnabled */));
+        verifyHandlingNetworkLoss(vpnSnapShot);
     }
 
     @Test
     public void testStartPlatformVpnHandlesNetworkLoss_mobikeDisabled() throws Exception {
         final PlatformVpnSnapshot vpnSnapShot = verifySetupPlatformVpn(
                 createIkeConfig(createIkeConnectInfo(), false /* isMobikeEnabled */));
-
-        // Forget the #sendLinkProperties during first setup.
-        reset(mMockNetworkAgent);
-
-        // Mock network loss
-        vpnSnapShot.nwCb.onLost(TEST_NETWORK);
-
-        verifyHandlingNetworkLoss();
+        verifyHandlingNetworkLoss(vpnSnapShot);
     }
 
     @Test
diff --git a/tests/unit/java/com/android/server/ethernet/EthernetTrackerTest.java b/tests/unit/java/com/android/server/ethernet/EthernetTrackerTest.java
index ea3d392..dde1d94 100644
--- a/tests/unit/java/com/android/server/ethernet/EthernetTrackerTest.java
+++ b/tests/unit/java/com/android/server/ethernet/EthernetTrackerTest.java
@@ -353,22 +353,6 @@
     }
 
     @Test
-    public void testEnableInterfaceCorrectlyCallsFactory() {
-        tracker.enableInterface(TEST_IFACE, NULL_CB);
-        waitForIdle();
-
-        verify(mFactory).updateInterfaceLinkState(eq(TEST_IFACE), eq(true /* up */));
-    }
-
-    @Test
-    public void testDisableInterfaceCorrectlyCallsFactory() {
-        tracker.disableInterface(TEST_IFACE, NULL_CB);
-        waitForIdle();
-
-        verify(mFactory).updateInterfaceLinkState(eq(TEST_IFACE), eq(false /* up */));
-    }
-
-    @Test
     public void testIsValidTestInterfaceIsFalseWhenTestInterfacesAreNotIncluded() {
         final String validIfaceName = TEST_TAP_PREFIX + "123";
         tracker.setIncludeTestInterfaces(false);
diff --git a/tests/unit/java/com/android/server/net/BpfInterfaceMapUpdaterTest.java b/tests/unit/java/com/android/server/net/BpfInterfaceMapUpdaterTest.java
index 83e6b5f..c730856 100644
--- a/tests/unit/java/com/android/server/net/BpfInterfaceMapUpdaterTest.java
+++ b/tests/unit/java/com/android/server/net/BpfInterfaceMapUpdaterTest.java
@@ -42,7 +42,7 @@
 import com.android.net.module.util.BaseNetdUnsolicitedEventListener;
 import com.android.net.module.util.IBpfMap;
 import com.android.net.module.util.InterfaceParams;
-import com.android.net.module.util.Struct.U32;
+import com.android.net.module.util.Struct.S32;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRunner;
 import com.android.testutils.TestBpfMap;
@@ -69,14 +69,14 @@
     private final TestLooper mLooper = new TestLooper();
     private BaseNetdUnsolicitedEventListener mListener;
     private BpfInterfaceMapUpdater mUpdater;
-    private IBpfMap<U32, InterfaceMapValue> mBpfMap =
-            spy(new TestBpfMap<>(U32.class, InterfaceMapValue.class));
+    private IBpfMap<S32, InterfaceMapValue> mBpfMap =
+            spy(new TestBpfMap<>(S32.class, InterfaceMapValue.class));
     @Mock private INetd mNetd;
     @Mock private Context mContext;
 
     private class TestDependencies extends BpfInterfaceMapUpdater.Dependencies {
         @Override
-        public IBpfMap<U32, InterfaceMapValue> getInterfaceMap() {
+        public IBpfMap<S32, InterfaceMapValue> getInterfaceMap() {
             return mBpfMap;
         }
 
@@ -114,7 +114,7 @@
                 ArgumentCaptor.forClass(BaseNetdUnsolicitedEventListener.class);
         verify(mNetd).registerUnsolicitedEventListener(listenerCaptor.capture());
         mListener = listenerCaptor.getValue();
-        verify(mBpfMap).updateEntry(eq(new U32(TEST_INDEX)),
+        verify(mBpfMap).updateEntry(eq(new S32(TEST_INDEX)),
                 eq(new InterfaceMapValue(TEST_INTERFACE_NAME)));
     }
 
@@ -124,7 +124,7 @@
 
         mListener.onInterfaceAdded(TEST_INTERFACE_NAME2);
         mLooper.dispatchAll();
-        verify(mBpfMap).updateEntry(eq(new U32(TEST_INDEX2)),
+        verify(mBpfMap).updateEntry(eq(new S32(TEST_INDEX2)),
                 eq(new InterfaceMapValue(TEST_INTERFACE_NAME2)));
 
         // Check that when onInterfaceRemoved is called, nothing happens.
@@ -135,7 +135,7 @@
 
     @Test
     public void testGetIfNameByIndex() throws Exception {
-        mBpfMap.updateEntry(new U32(TEST_INDEX), new InterfaceMapValue(TEST_INTERFACE_NAME));
+        mBpfMap.updateEntry(new S32(TEST_INDEX), new InterfaceMapValue(TEST_INTERFACE_NAME));
         assertEquals(TEST_INTERFACE_NAME, mUpdater.getIfNameByIndex(TEST_INDEX));
     }
 
@@ -146,7 +146,7 @@
 
     @Test
     public void testGetIfNameByIndexException() throws Exception {
-        doThrow(new ErrnoException("", EPERM)).when(mBpfMap).getValue(new U32(TEST_INDEX));
+        doThrow(new ErrnoException("", EPERM)).when(mBpfMap).getValue(new S32(TEST_INDEX));
         assertNull(mUpdater.getIfNameByIndex(TEST_INDEX));
     }
 
@@ -163,8 +163,8 @@
 
     @Test
     public void testDump() throws ErrnoException {
-        mBpfMap.updateEntry(new U32(TEST_INDEX), new InterfaceMapValue(TEST_INTERFACE_NAME));
-        mBpfMap.updateEntry(new U32(TEST_INDEX2), new InterfaceMapValue(TEST_INTERFACE_NAME2));
+        mBpfMap.updateEntry(new S32(TEST_INDEX), new InterfaceMapValue(TEST_INTERFACE_NAME));
+        mBpfMap.updateEntry(new S32(TEST_INDEX2), new InterfaceMapValue(TEST_INTERFACE_NAME2));
 
         final String dump = getDump();
         assertDumpContains(dump, "IfaceIndexNameMap: OK");
diff --git a/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java b/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java
index fdbccba..6448819 100644
--- a/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java
+++ b/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java
@@ -139,7 +139,7 @@
 import com.android.net.module.util.IBpfMap;
 import com.android.net.module.util.LocationPermissionChecker;
 import com.android.net.module.util.Struct;
-import com.android.net.module.util.Struct.U32;
+import com.android.net.module.util.Struct.S32;
 import com.android.net.module.util.Struct.U8;
 import com.android.net.module.util.bpf.CookieTagMapKey;
 import com.android.net.module.util.bpf.CookieTagMapValue;
@@ -249,7 +249,7 @@
     private HandlerThread mHandlerThread;
     @Mock
     private LocationPermissionChecker mLocationPermissionChecker;
-    private TestBpfMap<U32, U8> mUidCounterSetMap = spy(new TestBpfMap<>(U32.class, U8.class));
+    private TestBpfMap<S32, U8> mUidCounterSetMap = spy(new TestBpfMap<>(S32.class, U8.class));
     @Mock
     private BpfNetMaps mBpfNetMaps;
     @Mock
@@ -478,7 +478,7 @@
             }
 
             @Override
-            public IBpfMap<U32, U8> getUidCounterSetMap() {
+            public IBpfMap<S32, U8> getUidCounterSetMap() {
                 return mUidCounterSetMap;
             }
 
@@ -646,7 +646,7 @@
         mService.incrementOperationCount(UID_RED, 0xFAAD, 4);
         mService.noteUidForeground(UID_RED, true);
         verify(mUidCounterSetMap).updateEntry(
-                eq(new U32(UID_RED)), eq(new U8((short) SET_FOREGROUND)));
+                eq(new S32(UID_RED)), eq(new U8((short) SET_FOREGROUND)));
         mService.incrementOperationCount(UID_RED, 0xFAAD, 6);
 
         forcePollAndWaitForIdle();
@@ -1311,7 +1311,7 @@
                 .insertEntry(TEST_IFACE, UID_RED, SET_FOREGROUND, 0xFAAD, 1L, 1L, 1L, 1L, 0L));
         mService.noteUidForeground(UID_RED, true);
         verify(mUidCounterSetMap).updateEntry(
-                eq(new U32(UID_RED)), eq(new U8((short) SET_FOREGROUND)));
+                eq(new S32(UID_RED)), eq(new U8((short) SET_FOREGROUND)));
         mService.incrementOperationCount(UID_RED, 0xFAAD, 1);
 
         forcePollAndWaitForIdle();
@@ -1927,7 +1927,7 @@
         mService.incrementOperationCount(UID_RED, 0xFAAD, 4);
         mService.noteUidForeground(UID_RED, true);
         verify(mUidCounterSetMap).updateEntry(
-                eq(new U32(UID_RED)), eq(new U8((short) SET_FOREGROUND)));
+                eq(new S32(UID_RED)), eq(new U8((short) SET_FOREGROUND)));
         mService.incrementOperationCount(UID_RED, 0xFAAD, 6);
 
         forcePollAndWaitForIdle();
@@ -2424,13 +2424,13 @@
 
         mAppUidStatsMap.insertEntry(new UidStatsMapKey(uid), new StatsMapValue(10, 10000, 6, 6000));
 
-        mUidCounterSetMap.insertEntry(new U32(uid), new U8((short) 1));
+        mUidCounterSetMap.insertEntry(new S32(uid), new U8((short) 1));
 
         assertTrue(cookieTagMapContainsUid(uid));
         assertTrue(statsMapContainsUid(mStatsMapA, uid));
         assertTrue(statsMapContainsUid(mStatsMapB, uid));
         assertTrue(mAppUidStatsMap.containsKey(new UidStatsMapKey(uid)));
-        assertTrue(mUidCounterSetMap.containsKey(new U32(uid)));
+        assertTrue(mUidCounterSetMap.containsKey(new S32(uid)));
     }
 
     @Test
@@ -2447,14 +2447,14 @@
         assertFalse(statsMapContainsUid(mStatsMapA, UID_BLUE));
         assertFalse(statsMapContainsUid(mStatsMapB, UID_BLUE));
         assertFalse(mAppUidStatsMap.containsKey(new UidStatsMapKey(UID_BLUE)));
-        assertFalse(mUidCounterSetMap.containsKey(new U32(UID_BLUE)));
+        assertFalse(mUidCounterSetMap.containsKey(new S32(UID_BLUE)));
 
         // assert that UID_RED related tag data is still in the maps.
         assertTrue(cookieTagMapContainsUid(UID_RED));
         assertTrue(statsMapContainsUid(mStatsMapA, UID_RED));
         assertTrue(statsMapContainsUid(mStatsMapB, UID_RED));
         assertTrue(mAppUidStatsMap.containsKey(new UidStatsMapKey(UID_RED)));
-        assertTrue(mUidCounterSetMap.containsKey(new U32(UID_RED)));
+        assertTrue(mUidCounterSetMap.containsKey(new S32(UID_RED)));
     }
 
     private void assertDumpContains(final String dump, final String message) {
diff --git a/tools/Android.bp b/tools/Android.bp
index 7d6b248..3ce76f6 100644
--- a/tools/Android.bp
+++ b/tools/Android.bp
@@ -27,14 +27,6 @@
         "gen_jarjar.py",
     ],
     main: "gen_jarjar.py",
-    version: {
-        py2: {
-            enabled: false,
-        },
-        py3: {
-            enabled: true,
-        },
-    },
     visibility: ["//packages/modules/Connectivity:__subpackages__"],
 }
 
@@ -95,12 +87,4 @@
         ":jarjar-rules-generator-testjavalib",
     ],
     main: "gen_jarjar_test.py",
-    version: {
-        py2: {
-            enabled: false,
-        },
-        py3: {
-            enabled: true,
-        },
-    },
 }